JP2022539825A - Cosmetic and/or skin care dry composition - Google Patents

Abstract

The present invention provides a cosmetic and/or skin care dry composition, a process for producing a cosmetic and/or skin care dry composition, the use of the dry composition as a cosmetic and/or skin care composition, and It relates to the use of a mixture comprising a first component and a second component as a replacement for talc or talc-containing materials in cosmetic and/or skin care dry compositions.

Description

The present invention provides a cosmetic and/or skin care dry composition, a process for producing a cosmetic and/or skin care dry composition, the use of the dry composition as a cosmetic and/or skin care composition, and A mixture comprising a first component that is natural ground or precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate as a replacement for talc or talc-containing materials in cosmetic and/or skin care compositions Regarding use.

Dry cosmetic and/or skin care compositions are used for a variety of different applications. For example, dry cosmetic and/or skin care compositions can be applied to modify skin appearance by absorbing moisture and/or bodily fluids such as sebum, lipids, perspiration, or urine. By absorbing moisture, sebum, lipids, sweat, or other bodily fluids from the skin surface, a non-shiny looking skin can be obtained, which often has a cleaner and/or more natural skin appearance. Accompanied by Dry cosmetic and/or skin care compositions may also be used for coloring the skin, concealing blemishes, concealing or reducing fine lines or wrinkles, minimizing pores, or altering skin tone and/or Or it can also be used for uniformity.

In addition, dry cosmetic and/or skin care compositions are also used to modify skin feel. For example, by absorbing water, residual moisture, and/or bodily fluids such as sebum, lipids, or sweat from the skin surface, it has a softer skin feel and/or, for example, clothing, diapers, gloves, and/or Or you can get smoother skin that reduces friction with a mechanical or electric shaver. In addition, the absorption of bodily fluids may also provide the user with a dry and/or pleasant skin feel during and/or after application of the dry composition and/or avoid the generation of unpleasant odors. can.

In addition to providing one or more of the above benefits, dry cosmetic and/or skin care compositions typically need to meet additional criteria in order to be well accepted by customers. For example, dry cosmetic and/or skin care compositions should adhere well to the skin, should be easily applicable by the user, and/or should give the user a pleasant feel upon application. is.

Furthermore, dry cosmetic and/or skin care compositions should not contain any ingredients that could be considered a health concern for the user. For example, certain silicates, such as talc or talc-containing materials, are believed to increase the risk of lung disease if accidentally inhaled due to misuse and/or overuse of the composition. From that point of view, customers usually prefer dry cosmetic and/or skin care compositions that do not contain ingredients such as talc or talc-containing materials. For example, by using dry cosmetic and/or skin care compositions that are free of talc or talc-containing materials, potential health risks from unintentional inhalation of the composition can be minimized or avoided. Unintentional inhalation of dry cosmetic and/or skin care compositions is usually of particular concern when dry cosmetic and/or skin care compositions are applied to the skin of infants in the form of baby powder. Another health concern relates to the use of dry cosmetic and/or skin care compositions containing talc or talc-containing materials on sensitive body areas such as the genital area. For example, a US lawsuit alleges that the use of talcum powder near the female genitalia may increase the risk of ovarian cancer.

In light of the above, there continues to be a need in the art for dry cosmetic and/or skin care compositions that exhibit alternative or improved skin appearance modification and/or skin feel modification. There is also a need in the art for dry cosmetic and/or skin care compositions that more effectively reduce friction between the skin and objects that come in contact with the skin than known products. There is also a need in the art for dry cosmetic and/or skin care compositions that are better or easier to apply to the skin than known products. Further, there is a need in the art for dry cosmetic and/or skin care compositions that do not contain ingredients considered to be of health concern, such as talc or talc-containing materials. In particular, there is a need for cosmetic and/or skin care compositions, especially baby powders and/or body powders, which are free of talc or talc-containing materials.

It is therefore an object of the present invention to provide dry cosmetic and/or skin care compositions which exhibit alternative or improved skin appearance modification and/or skin feel modification. Another object of the present invention is to provide a dry cosmetic and/or skin care composition that more effectively reduces the friction between the skin and objects in contact with the skin. Yet another object of the present invention is to provide dry cosmetic and/or skin care compositions that are better or easier to apply to the skin. Yet another object of the present invention is to provide dry cosmetic and/or skin care compositions that do not contain ingredients considered to be of health concern, such as talc or talc-containing materials. Yet another object of the present invention is to provide dry cosmetic and/or skin care compositions, in particular baby powders and/or body powders, which are free of talc or talc-containing materials. Yet another object of the present invention is a dry cosmetic and/or skin care composition that is free of talc or talc-containing materials and provides at least a sufficient modification of skin appearance, skin feel, skin smoothness, and a satisfactory applicability. To provide products, in particular baby powders and/or body powders.

One or more of the above objectives are solved by the present invention.

According to one aspect of the present invention, dry cosmetic and/or skin care compositions are provided. A dry cosmetic and/or skin care composition comprises a mixture of a first component that is natural ground or precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, where the carbon dioxide reacts with at least one H ₃ O ⁺ ion donor Formed in situ by the process and/or supplied from an external source.

The inventors have surprisingly found that dry cosmetic and/or skin care compositions according to the invention, for example in the form of loose baby powders or body powders, can be applied well to the skin. For example, it has good skin adhesion, spreads well and offers little resistance when applied to the skin. Application of the dry cosmetic and/or skin care composition according to the invention leaves the skin feeling soft and dry. Further, dry cosmetic and/or skin care compositions according to the present invention do not require ingredients such as talc or talc-containing materials that are considered health concerns by some customers.

According to another aspect of the present invention, there is provided a method for manufacturing a dry cosmetic and/or skin care composition.
This method includes the following steps:
(a) providing a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b);

According to another aspect of the present invention, dry compositions as cosmetic and/or skin care compositions, preferably as cosmetic and/or skin care powders, most preferably as baby powders and/or body powders use is provided. The dry composition comprises a mixture of a first component that is naturally ground or precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein the surface-reacted calcium carbonate is naturally ground or precipitated calcium carbonate. a reaction product of calcium with carbon dioxide and at least one H ₃ O ⁺ ion donor, the carbon dioxide being formed in situ by treatment with at least one H ₃ O ⁺ ion donor; /or supplied from an external source.

The inventors have surprisingly found that the dry compositions described herein effectively provide moisture and/or body fluid absorption, skin feel modification, and/or skin appearance modification, It was found to be useful as a dry composition for cosmetics and/or skin care.

According to another aspect of the present invention there is provided the use of the mixture as a replacement for talc or talc-containing materials in dry cosmetic and/or skin care compositions. The mixture comprises a first component that is naturally ground or precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein the surface-reacted calcium carbonate is naturally ground or precipitated calcium carbonate. with carbon dioxide and at least one H ₃ O ⁺ ion donor, the carbon dioxide being formed in situ by treatment with at least one H ₃ O ⁺ ion donor; and/ or supplied from an external source.

The inventors have surprisingly found that the mixture of the first and second components described herein can be used as a component of dry cosmetic and/or skin care compositions such as baby powders and/or body powders. , was found to mimic the properties of talc to some extent. In particular, the use of mixtures of the first component and the second component described herein in dry cosmetic and/or skin care compositions can improve skin feel, skin appearance, moisture and body fluids during and/or after application. In terms of absorption, it has been found to exhibit similar or even improved properties compared to cosmetic and/or skin care dry compositions containing equivalent or the same amount of talc to provide these properties. .

Advantageous embodiments of dry cosmetic and/or skin care compositions, methods for producing such compositions and their use are defined in the corresponding dependent claims.

It should be understood that all embodiments described herein of dry cosmetic and/or skin care compositions according to the present invention are also embodiments of methods for making and methods of using the compositions of the present invention. . Likewise, all embodiments described herein of the first component and/or the second component present in the composition according to the invention are relevant to the method for making the composition of the invention and the method of using it. It is also an embodiment of

According to one embodiment of the invention, the dry cosmetic and/or skin care composition is a powder, preferably a baby powder and/or a body powder.

According to one embodiment of the present invention, the first component comprises from 1% to 99% by weight, preferably from 30% to 99% by weight, more preferably from 30% to 99% by weight, based on the total weight of the first and second components. is present in an amount of 50% to 95%, even more preferably 60% to 95%, most preferably 70% to 90% by weight, and the second component comprises the first component and the second component 1 wt% to 99 wt%, preferably 1 wt% to 70 wt%, more preferably 5 wt% to 50 wt%, even more preferably 5 wt% to 40 wt%, most preferably is present in an amount of 10% to 30% by weight.

According to one embodiment of the invention, the first component is natural ground calcium carbonate selected from the group consisting of marble, chalk, limestone, and mixtures thereof, or the first component is aragonite, vaterite, or A precipitated calcium carbonate selected from the group consisting of a precipitated calcium carbonate having the crystalline form of calcite, and mixtures thereof.

According to one embodiment of the present invention, the surface-reacted calcium carbonate is natural ground calcium carbonate selected from the group consisting of marble, chalk, limestone, and mixtures thereof, carbon dioxide and at least one H ₃ O ⁺ ion. The reaction product with the donor, carbon dioxide, is formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source, or surface-reacted calcium carbonate is the reaction of precipitated calcium carbonate selected from the group consisting of precipitated calcium carbonate having the crystalline form of aragonite, vaterite, or calcite, and mixtures thereof, with carbon dioxide and at least one H ₃ O ⁺ ion donor. The product, carbon dioxide, is formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source.

According to one embodiment of the invention, the at least one H ₃ O ⁺ ion donor consists of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, citric acid, oxalic acid, acid salts, acetic acid, formic acid and mixtures thereof. The at least one H ₃ O ⁺ ion donor is selected from the group, preferably at least with a cation selected from hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid; Li ⁺ , Na ⁺ and/or K ⁺ partially neutralized H ₂ PO ₄ ⁻ ; HPO ₄ ²⁻ at least partially neutralized with cations selected from Li ⁺ , Na ⁺ , K ⁺ , Mg ²⁺ and/or Ca ²⁺ and mixtures thereof, more preferably the at least one H ₃ O ⁺ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, and mixtures thereof , most preferably, the at least one H ₃ O ⁺ ion donor is phosphoric acid.

According to one embodiment of the present invention, the volume median particle size d50 of the first component is _0.1-50 μm, preferably 0.5-40 μm, more preferably 0.5-20 μm, even more preferably 0 .5-10 μm, most preferably 0.8-8 μm, and/or the specific surface area of the first component is between 0.5 m ² /g and 30 m ² /g as measured using nitrogen and the BET method, It is preferably 1 m ² /g to 20 m ² /g, more preferably 2 m ² /g to 15 m ² /g.

According to one embodiment of the present invention, the second component has a volume median particle size d ₅₀ of 0.5 to 50 μm, preferably 1 to 40 μm, more preferably 1.2 to 30 μm, even more preferably 1.5 ~15 μm, most preferably 3-10 μm, and/or the specific surface area of the second component is between 15 m ² /g and 200 m ² /g, preferably 20 m ² /g, measured using nitrogen and the BET method. ~180 m ² /g, preferably 25 m ² /g to 160 m ² /g, most preferably 30 m ² /g to 90 m ² /g.

According to one embodiment of the present invention, the dry cosmetic and/or skin care composition is free of talc or talc-containing materials.

According to one embodiment of the present invention, the dry cosmetic and/or skin care composition comprises one or more further ingredients, preferably the one or more further ingredients are fragrances, perfumes, antibacterial and/or or selected from the group consisting of disinfectants, fatty acids or salts thereof, fatty alcohols, vegetable or synthetic oils, carbohydrate polymers, mineral additives, pigments, salts, and mixtures thereof.

According to one embodiment of the present invention, the first component of step (a) and the second component of step (b) are provided in dry form and the mixing step (c) is a dry blending step, or or the first component of step (a) and/or the second component of step (b) are provided in the form of an aqueous suspension, preferably in the form of a slurry, the method further comprising drying the resulting mixture, preferably step (d) is a spray drying step or a superheated steam drying step, more preferably a spray drying step.

According to one embodiment of the present invention, the composition is used to absorb fluids, reduce skin friction, modify skin feel, and/or modify skin appearance. .

For purposes of the present invention, it should be understood that the following terms have the following meanings.

A "cosmetic and/or skin care dry composition" in the sense of the present invention is a cosmetic and/or skin care composition that is applied to the skin, does not contain harmful and/or irritating substances and/or contains It means a dry composition that does not contain substances for which it is not approved for use. Substances not approved for use in cosmetics are, for example, defined in "REGULATION (EC) No. 1223/2009 OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL". can find out. "Dry cosmetic and/or skin care compositions" include compositions typically taken orally or typically used as personal care products for other parts of the body such as teeth, hair, nails, etc. Compositions are not included. A cosmetic and/or skin care "dry" composition in the sense of the present invention has a water content of less than 15% by weight, preferably 10% by weight, based on the total weight of the cosmetic and/or skin care composition. less than 5.0% by weight, more preferably less than 5.0% by weight. Suitable methods for determining the water content of dry cosmetic and/or skin care compositions will be selected by those skilled in the art. For example, water content may be determined according to the coulometric Karl Fischer method, where the composition is heated to 220° C., released as a vapor, and isolated using a nitrogen gas flow (100 ml/min). The water content is measured with a coulometric Karl Fischer apparatus.

"Natural ground calcium carbonate" (GCC) in the sense of the present invention is obtained from natural sources such as limestone, marble or chalk and is subjected to wet and/or dry processes such as grinding, screening, fractionation, for example by cyclones or classifiers. is calcium carbonate treated with

"Precipitated calcium carbonate" (PCC) in the sense of the present invention is by precipitation after the reaction of carbon dioxide with lime in an aqueous, semi-dry or moist environment, or by precipitation of calcium with a source of carbonate ions in water. It is a synthesized material obtained by PCC may be in the crystalline form of vaterite, calcite, or aragonite. PCC can be found, for example, in EP 2447213 A1, EP 2524898 A), EP 2371766 A1, EP 1712597 A1, EP 1712597 A1. No. 1712523 A1 or WO 2013/142473 A1.

The term "surface reaction" in the sense of this application means that a material undergoes treatment with H ₃ O ⁺ ion donors (e.g. with water-soluble free acids and/or acid salts) in an aqueous environment. It shall be used to indicate that the material has been subjected to a process that involves partial dissolution of this material in a subsequent crystallization process that may occur in the presence or absence of additional crystallization additives.

"H ₃ O ⁺ ion donors" in the context of the present invention are Bronsted acids and/or acid salts, ie salts containing acidic hydrogen.

The term "acid" as used herein means an acid in the sense defined by Bronsted and Lowry (eg H ₂ SO ₄ , HSO ₄ ⁻ ).

The term "free acid" refers only to acids that are in their fully protonated form ₍ eg _H2SO4 ).

Cosmetic and/or skin care “powder” in the sense of the present invention refers only to particulate ingredients whose weight median particle size d50 is 200 μm or less, preferably ₁₀₀ μm or less, more preferably 80 μm or less, most preferably 60 μm or less. means a cosmetic and/or skin care composition containing

The "particle size" of a particulate material is described by its particle size distribution _dx . Unless otherwise specified, the _value of dx represents the diameter for _x weight percent of the particles having a diameter less than dx. This means, for example, that a value of d20 means that ₂₀ % by weight of all particles have a size smaller than that size. The value of d50 is therefore the weight median particle size, ie ₅₀ % by weight of all particles are smaller than this particle size. For the purposes of the present invention, particle size is defined as the weight median particle size d ₅₀ (weight), unless otherwise indicated. Particle size was measured using a Micromeritics Instrument Corporation Sedigraph™ 5100 or Sedigraph™ 5120 instrument. This method and apparatus are known to those skilled in the art and are commonly used for particle size determination of fillers and pigments. Measurements were carried out in an aqueous solution of 0.1% by weight Na ₄ P ₂ O ₇ .

For certain materials defined herein, "particle size" is described as volume-based particle size distribution. This is denoted, for example, as "volume-based median particle size", "volume median particle size", or "volume topcut particle size". Volume median particle size _d50 was evaluated using a Malvern Mastersizer 2000 or 3000 laser diffraction system. A value of d50 or _d98 , measured with a Malvern Mastersizer 2000 or 3000 laser diffraction system, preferably a Malvern Mastersizer 3000 laser diffraction system, wherein 50% or ₉₈ % by volume of the particles, respectively, have a diameter below this value It shows the value of such diameter. The raw data obtained from the measurements are analyzed using Mie theory with a particle refractive index of 1.57 and an absorption index of 0.005. Measurements were carried out in an aqueous solution of 0.1% by weight Na ₄ P ₂ O ₇ .

The term "particulate matter" in the sense of this application means a material composed of a plurality of particles. This plurality of particles can be defined, for example, by their particle size distribution. The expression "particulate material" may include granules, powders, granules, tablets or crumbs.

The "specific surface area" (expressed in units of m ² /g) of materials used throughout this document is the can be measured by use. This method is known to those skilled in the art and is defined in ISO 9277:2010. Prior to such measurements, samples were filtered through a Buchner funnel, rinsed with deionized water, and dried at 110° C. in an oven for at least 12 hours. The total surface area of this material (in units of m ² ) can be obtained by multiplying the material's specific surface area (in units of m ² /g) by its mass (in units of g).

In the context of the present invention, the term "pores" refers to spaces found between and/or within particles, i.e. formed when particles, such as powders or compacts (compressed bodies), are packed together under closest contact. spaces within the porous particles (inter-particle pores), and/or void spaces within the porous particles (intra-particle pores) that, when saturated with liquid, are permeable to liquid under pressure, and/ or to represent spaces that support the absorption of surface-wetting liquids.

Unless otherwise specified, the term "dry" means that at least a portion of the water has been removed from the material to be dried such that the resulting "dried" material reaches constant weight at 200°C. means the process of Additionally, a "dried" or "dry" material, unless otherwise specified, has a total moisture content of 1.0% or less, preferably 0% by weight, based on the total weight of the dried material. .5 wt% or less, more preferably 0.2 wt% or less, most preferably 0.03 to 0.07 wt%.

For the purposes of this application, a "water-insoluble" material is defined as if it is mixed with 100 ml of deionized water, filtered at 20°C and the filtrate is collected, and 100 g of this filtrate is evaporated at 95-100°C. is defined as material from which 0.1 g or less of solid material is recovered after A "water soluble" material is defined as a material from which more than 0.1 g of solid material is recovered after evaporating 100 g of this filtrate at 95-100°C. For the purpose of assessing whether a material is an insoluble material or a soluble material in the sense of the invention, the sample size is greater than 0.1 g, preferably 0.5 g or more.

A "suspension" or "slurry" in the sense of the present invention comprises undissolved solids and water and, if desired, further additives, and usually contains a large amount of solids so that it is formed It may be more viscous and denser than the original liquid.

The expression "skin feel" in the sense of the present invention means the feel of the skin during and/or after application of the dry cosmetic and/or skin care composition to the skin surface. For example, skin feel can relate to a soft, smooth, silky, dry, taut, and/or elastic skin feel.

The expression "skin appearance" in the sense of the invention relates to the optical impression of the skin to the eye of the observer during and/or after application of the dry cosmetic and/or skin care composition. For example, the skin may have a glossy, matt, even, or uneven tone appearance.

When an indefinite or definite article is used when referring to a noun in the singular, e.g., "a", "an", or "the", this refers to the noun unless specifically stated otherwise. Including multiple of

When the term "comprising" is used in the specification and claims, it does not exclude other elements. For the purposes of the present invention, the term "consisting of" is considered to be a preferred embodiment of the term "comprising." Where a group is hereinafter stated to include at least a certain number of embodiments, this should also be understood to disclose a group that preferably consists exclusively of those embodiments.

Terms such as "obtainable" or "definable" and "obtained" or "defined" are used interchangeably. This means, for example, that the term "obtained" must result in an embodiment by a series of steps following the term "obtained," unless the context clearly indicates otherwise. Although not meant to indicate, such a limited understanding is meant to indicate that it is always included as a preferred embodiment by the terms "obtained" or "defined".

Whenever the terms "including" or "having" are used, they are intended to be equivalent to "comprising" as defined above.

Preferred embodiments of the compositions of the invention are described in more detail below.

First Component A dry cosmetic and/or skin care composition according to the present invention comprises a first component which is natural ground calcium carbonate or precipitated calcium carbonate.

The first component of the dry cosmetic and/or skin care composition of the present invention is present in dry form. For example, the residual moisture content of the first component is less than 3.0 wt%, preferably less than 2.0 wt%, more preferably less than 1.0 wt%, based on the total dry weight of the first component. obtain. The residual moisture content can be measured as described above for dry cosmetic and/or skin care compositions.

According to one embodiment, the volume median particle size d ₅₀ of the first component is from 0.1 to 50 μm, preferably from 0.5 to 40 μm, more preferably from 0.5 to 20 μm, even more preferably from 0.5 to 10 μm, most preferably 0.8-8 μm, and/or the specific surface area of the first component, measured using nitrogen and the BET method, is between 0.5 m ² /g and 30 m ² /g, preferably 1 m ² /g to 20 m ² /g, more preferably 2 m ² /g to 15 m ² /g. According to another embodiment, the volume median particle size d ₅₀ of the first component is from 0.1 to 50 μm, preferably from 0.5 to 40 μm, more preferably from 0.5 to 20 μm, even more preferably from 0.5 to 10 μm, most preferably 0.8-8 μm, and the specific surface area of the first component, measured using nitrogen and the BET method, is between 0.5 m ² /g and 30 m ² /g, preferably 1 m ² / g to 20 m ² /g, more preferably 2 m ² /g to 15 m ² /g.

According to one preferred embodiment, the dry cosmetic and/or skin care composition according to the invention comprises a first component which is natural ground calcium carbonate.

It is understood that the natural ground calcium carbonate may be one particular natural ground calcium carbonate or a mixture of different types of natural ground calcium carbonate.

In one embodiment of the invention, the natural ground calcium carbonate comprises, preferably consists of, one type of natural ground calcium carbonate. Alternatively, the natural ground calcium carbonate comprises, preferably consists of, two or more types of natural ground calcium carbonate. For example, the natural ground calcium carbonate comprises and preferably consists of two or three types of natural ground calcium carbonate. Preferably, the natural ground calcium carbonate comprises, more preferably consists of, one type of natural ground calcium carbonate.

In one embodiment of the invention the natural ground calcium carbonate is a ground calcium carbonate containing mineral, preferably the calcium carbonate containing mineral is selected from the group consisting of chalk, limestone, marble, dolomite and mixtures thereof. be.

In a preferred embodiment of the invention the natural ground calcium carbonate is selected from the group consisting of chalk, limestone or marble. More preferably, the natural ground calcium carbonate is limestone or marble, most preferably marble.

Natural ground calcium carbonate can be obtained from natural calcium carbonate-bearing minerals (eg, chalk, limestone, marble, or dolomite) by wet and/or dry comminution processes, such as, for example, crushing and/or grinding. According to one embodiment, the natural ground calcium carbonate is wet ground natural ground calcium carbonate. In another embodiment, the natural ground calcium carbonate is dry ground natural ground calcium carbonate.

The comminution step may be carried out by any conventional comminution equipment, e.g. under conditions where refinement is primarily due to impact by secondary objects, i.e. ball mills, rod mills, vibratory mills, roll crushers. , centrifugal impact mill, vertical bead mill, friction grinding mill, pin mill, hammer mill, pulverizer, shredder, declamper, knife cutter, or one or more of such devices known to those skilled in the art. . The grinding step may be performed under conditions where autogenous grinding occurs and/or by a horizontal ball mill and/or by other such processes known to those skilled in the art.

In one embodiment, the grinding is done in a vertical or horizontal ball mill, preferably in a vertical ball mill. Such vertical and horizontal ball mills usually consist of a vertically or horizontally arranged cylindrical grinding chamber with a fast axially rotating stirring shaft fitted with a plurality of paddles and/or stirring discs, For example, as described in EP 0607840 A1.

Note that the comminution of the calcium carbonate-containing mineral may be performed by using at least one of the comminution methods or comminution equipment described above. However, it is also possible to use any of the methods described above in combination, or to use any of the comminution devices described above in succession.

Following the grinding step, the ground calcium carbonate-containing mineral can optionally be separated into two or more fractions each having a different particle distribution by using a classification step. A classification step generally serves to divide a feed fraction having a certain particle size distribution into a coarse fraction that can be subjected to another grinding cycle and a fine fraction that can be used as a final product. For this purpose screening devices as well as gravity-based devices such as centrifuges or cyclones (eg hydrocyclones) and combinations of any of the above devices may be used.

When the first component of the dry cosmetic and/or skin care composition according to the present invention is natural ground calcium carbonate, the natural ground calcium carbonate has specific physical properties such as specific particle size and/or specific surface area. be able to.

According to one embodiment, the volume median particle size d ₅₀ of the natural ground calcium carbonate is 0.1-50 μm, preferably 0.5-40 μm, more preferably 0.5-20 μm, even more preferably 0.5 ~10 μm, most preferably 0.8-8 μm, and/or a volume topcut particle size d ₉₈ of 2-80 μm, preferably 2-60 μm, more preferably 2-40 μm, even more preferably 3-30 μm. , most preferably 4 to 20 μm.

According to one embodiment, the specific surface area of the natural ground calcium carbonate is between 0.5 m ² /g and 30 m ² /g, preferably between 1 m ² /g and 20 m ² /g, measured using nitrogen and the BET method. , more preferably 2 m ² /g to 15 m ² /g.

According to one preferred embodiment, the first component has a volume median particle size d ₅₀ of 0.1 to 50 μm, preferably 0.5 to 40 μm, more preferably 0.5 to 20 μm, even more preferably 0.5 to 40 μm. 5 to 10 μm, most preferably 0.8 to 8 μm, and a volume topcut particle size d ₉₈ of 2 to 80 μm, preferably 2 to 60 μm, more preferably 2 to 40 μm, even more preferably 3 to 30 μm, It is most preferably 4 to 20 μm, and the specific surface area measured using nitrogen and the BET method is 0.5 m ² /g to 30 m ² /g, preferably 1 m ² /g to 20 m ² /g, more preferably 2 m ² /g to 15 m ² /g of natural ground calcium carbonate.

In one embodiment, the natural ground calcium carbonate has a volume median particle size d ₅₀ of 0.8-8 μm and a volume topcut particle size d ₉₈ of 4-20 μm and a specific surface area of nitrogen and It is between 2 m ² /g and 15 m ² /g, measured using the BET method.

According to another embodiment, the first component of the dry cosmetic and/or skin care composition of the present invention is precipitated calcium carbonate.

It is understood that the precipitated calcium carbonate may be one precipitated calcium carbonate or a mixture of different types of precipitated calcium carbonate.

In one embodiment of the invention, the precipitated calcium carbonate comprises, preferably consists of, one type of precipitated calcium carbonate. Alternatively, the precipitated calcium carbonate comprises, preferably consists of, two or more precipitated calcium carbonates. For example, the precipitated calcium carbonate comprises, preferably consists of, two or three types of precipitated calcium carbonate. Preferably, the precipitated calcium carbonate comprises, more preferably consists of, one type of precipitated calcium carbonate.

According to one embodiment, the precipitated calcium carbonate is selected from the group consisting of precipitated calcium carbonate having the crystalline form of aragonite, vaterite, or calcite, and mixtures thereof.

It is understood that precipitated calcium carbonate can have certain physical properties such as certain particle sizes or specific surface areas.

According to one embodiment, the precipitated calcium carbonate has a volume median particle size d ₅₀ of 0.1 to 50 μm, preferably 0.5 to 40 μm, more preferably 0.5 to 20 μm, even more preferably 0.5 to 40 μm. 10 μm, most preferably 0.8-8 μm.

According to another embodiment, the precipitated calcium carbonate has a volume median particle size d ₅₀ of 0.25-50 μm, more preferably 0.3-10 μm, most preferably 0.4-7 μm. In one embodiment, the precipitated calcium carbonate has a volume topcut particle size d ₉₈ of 1-100 μm, preferably 1-50 μm, more preferably 1.5-30 μm, most preferably 1.5-20 μm. According to another embodiment, the precipitated calcium carbonate has a volume median particle size d ₅₀ of 0.3-10 μm, most preferably 0.4-7 μm, and a volume topcut particle size d ₉₈ of 1.5-30 μm. , most preferably between 1.5 and 20 μm.

According to another embodiment, the specific surface area of the precipitated calcium carbonate is between 3 m ² /g and 50 m ² /g, preferably between 3 m ² /g and 35 m ² /g, most preferably between 3 m 2 /g and 50 m 2 /g, measured using the nitrogen and BET method. is between 3 m ² /g and 25 m ² /g.

According to another embodiment, the precipitated calcium carbonate has a volume median particle size d ₅₀ of 0.3-10 μm, most preferably 0.4-7 μm, and a volume topcut particle size d ₉₈ of 1.5-10 μm. 30 μm, most preferably 1.5 to 20 μm, and a specific surface area of 3 m ² /g to 50 m ² /g, preferably 3 m ² /g to 35 m ² /g, measured using nitrogen and the BET method. , most preferably from 4 m ² /g to 25 m ² /g.

According to another embodiment, the weight median particle size d ₅₀ of the precipitated calcium carbonate is 0.3-5 μm, preferably 0.4-3 μm, and the weight top-cut particle size d ₉₈ is 1.5-10 μm. , preferably 1.5 to 5 μm, and a specific surface area of 3 m ² /g to 50 m ² /g, preferably 4 m ² /g to 30 m ² /g, measured using nitrogen and the BET method .

Second Component The dry cosmetic and/or skin care composition according to the present invention comprises a second component which is surface-reacted calcium carbonate. Surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one _H3O ⁺ ion donor, wherein carbon dioxide is at least one _H3O ⁺ ion donor. It is formed in situ by treatment with the body and/or supplied from an external source.

The second component of the dry cosmetic and/or skin care composition of the present invention is present in dry form. For example, the residual moisture content of the second component may be less than 10 wt%, preferably less than 5.0 wt%, based on the total dry weight of the second component. For example, residual moisture can be approximately 3.0% by weight, based on the total dry weight of the second component. The residual moisture content can be measured as described above for dry cosmetic and/or skin care compositions.

It is understood that the surface-reacted calcium carbonate may be one surface-reacted calcium carbonate or a mixture of different types of surface-reacted calcium carbonate.

In one embodiment of the invention, the surface-reacted calcium carbonate comprises, preferably consists of, one type of surface-reacted calcium carbonate. Alternatively, the surface-reacted calcium carbonate comprises, preferably consists of, two or more surface-reacted calcium carbonates. For example, the surface-reacted calcium carbonate comprises, preferably consists of, two or three types of surface-reacted calcium carbonate. Preferably, the surface-reacted calcium carbonate comprises, more preferably consists of, one type of surface-reacted calcium carbonate.

In a preferred embodiment of the invention the surface-reacted calcium carbonate is obtained by a method comprising the steps of:
(a) providing a suspension of natural or precipitated calcium carbonate;
(b) adding at least one acid having a pK _a value of 0 or less at 20° C. or having a pK _a value of 0 to 2.5 at 20° C. to the suspension of step (a); and (c) before, during, or after step (b), treating the suspension of step (a) with carbon dioxide.
According to another embodiment, the surface-reacted calcium carbonate is obtained by a method comprising the steps of:
(A) providing natural or precipitated calcium carbonate;
(B) providing at least one water-soluble acid;
(C) providing _CO2 gas;
(D) contacting the natural or precipitated calcium carbonate of step (A) with the at least one acid of step (B) and the _CO2 of step (C);
Here, the method is characterized by:
(i) at least one acid of step (B) has _a pKa of greater than 2.5 and less than or equal to 7 at 20° C. associated with ionization of its first available hydrogen, and (ii) contacting said at least one acid with said natural or precipitated calcium carbonate; If the hydrogen-containing salt has a pK _a greater than 7 at 20° C. associated with the ionization of the first available hydrogen, and the salt anion is capable of forming a water-insoluble calcium salt. is additionally provided with at least one water-soluble salt.

"Natural ground calcium carbonate" (GCC) is preferably selected from calcium carbonate-containing minerals selected from the group comprising marble, chalk, limestone, and mixtures thereof. Natural ground calcium carbonate may contain additional natural ingredients such as magnesium carbonate, aluminosilicates, and the like.

In general, the comminution of natural ground calcium carbonate can be a dry or wet comminution process and can be carried out by any conventional comminution equipment, e.g. under conditions i.e. ball mills, rod mills, vibrating mills, roll crushers, centrifugal impact mills, vertical bead mills, friction grinding mills, pin mills, hammer mills, pulverizers, shredders, declampers, knife cutters, or any other known to those skilled in the art. It can be done by one or more of such devices. If the calcium carbonate-containing mineral material comprises a wet-ground calcium carbonate-containing mineral material, the grinding step may be performed under conditions where autogenous grinding occurs and/or by horizontal ball milling and/or other such methods known to those skilled in the art. process. The wet-processed ground calcium carbonate-containing mineral material thus obtained may be washed and dewatered by known processes such as flocculation, filtration, or forced evaporation before drying. A subsequent drying step (if required) may be done in a single step, such as spray drying, or in at least two steps. It is also common for such mineral materials to undergo beneficiation processes (such as flotation, bleaching, or magnetic separation processes) to remove impurities.

A "precipitated calcium carbonate" (PCC) in the sense of the invention is a synthetic material, generally by precipitation after the reaction of carbon dioxide with calcium hydroxide in an aqueous environment _, or with _CaCl2 and _Na2CO3 . Examples are obtained by precipitating calcium ions and carbonate ions from solution. Further possible methods for the production of PCC are the soda-lime process, or the Solvay process, in which PCC is a by-product of ammonia production. Precipitated calcium carbonate exists as three main crystalline forms: calcite, aragonite, and vaterite, and many different polymorphs (crystal habits) exist for each of these crystalline forms. Calcite has a trigonal crystal structure, and typical crystal habits include scalenohedral (S-PCC), rhombohedral (R-PCC), hexagonal columnar, tabular, colloidal (C- PCC), cubic, and prismatic (P-PCC). Aragonite has an orthorhombic crystal structure, and typical crystal habits include twinned hexagonal columnar crystals, thin elongated prismatic crystals, curved blade-like, steep pyramidal, chisel-like crystals, dendrites, and dendritic crystals. and with various combinations of coral-like or worm-like morphologies. Vaterite belongs to hexagonal crystals. The resulting PCC slurry can be mechanically dewatered and dried.

According to one embodiment of the invention, the precipitated calcium carbonate is a precipitated calcium carbonate which preferably comprises the mineralogical crystalline forms of aragonite, vaterite, or calcite, or mixtures thereof.

Precipitated calcium carbonate can be ground by the same means used to grind natural calcium carbonate as described above prior to treatment with carbon dioxide and at least one H ₃ O ⁺ ion donor.

According to one embodiment of the invention, the natural ground or precipitated calcium carbonate has a weight median particle size d50 of _0.05-10.0 μm, preferably 0.2-5.0 μm, most preferably 0.05-10.0 μm. It is in the form of particles that are 4-3.0 μm. According to a further embodiment of the invention, the natural ground or precipitated calcium carbonate has a weight top-cut particle size d ₉₈ of 0.15 to 30 μm, preferably 0.6 to 15 μm, more preferably 1.2 to 10 μm, Most preferred is in the form of particles that are 1.5-4 μm, especially 1.6 μm.

Natural ground calcium carbonate and/or precipitated calcium carbonate may be used dry or suspended in water. Preferably, the content of natural ground calcium carbonate or precipitated calcium carbonate of the corresponding slurry is from 1% to 90% by weight, more preferably from 3% to 60% by weight, even more preferably from 3% to 60% by weight, based on the weight of the slurry 5% to 40% by weight, most preferably 10% to 25% by weight.

The one or more H ₃ O ⁺ ion donors used in the preparation of surface-reacted calcium carbonate are strong acids, medium strength acids, or weak acids that generate H ₃ O ⁺ ions under the conditions of preparation, or Any mixture may be used. According to the invention, the at least one H ₃ O ⁺ ion donor may be an acid salt that generates H ₃ O ⁺ ions under prepared conditions.

According to one embodiment, the at least one H ₃ O ⁺ ion donor is a strong acid with a pK _a of 0 or less at 20°C.

According to another embodiment, the at least one H ₃ O ⁺ ion donor is a moderately strong acid with a pK _a value of 0 to 2.5 at 20°C. If the pK _a value at 20° C. is 0 or less, the acid is preferably selected from sulfuric acid, hydrochloric acid, or mixtures thereof. The H ₃ O ⁺ ion donor is preferably selected from H ₂ SO ₃ , H ₃ PO ₄ , oxalic acid, or mixtures thereof, if the pK _a value at 20° C. is between 0 and 2.5. . The at least one H ₃ O ⁺ ion donor may be an acid salt, for example HSO 4 ⁻ or HSO ₄ − at least partially neutralized with corresponding ^cations such as Li ⁺ , Na ⁺ or K H ₂ PO ₄ ⁻ , or HPO ₄ ²⁻ that is at least partially neutralized with corresponding cations such as Li ⁺ , Na ⁺ , K ⁺ , Mg ²⁺ , or Ca ²⁺ . The at least one H ₃ O ⁺ ion donor may be a mixture of one or more acids and one or more acid salts.

According to yet another embodiment, the at least one H ₃ O ⁺ ion donor has _a pKa value greater than 2.5 when measured at 20° C. associated with ionization of the first available hydrogen and 7 or less and the corresponding anion is a weak acid capable of forming a water-soluble calcium salt. Subsequently, the hydrogen-containing salt has _a pKa value greater than 7 when measured at 20° C. associated with ionization of the first available hydrogen, and the salt anion forms a water-insoluble calcium salt. Where possible, at least one water-soluble salt is additionally provided. According to a preferred embodiment, the weak acid has a pK _a value of greater than 2.5 to 5 at 20° C., more preferably the weak acid is selected from the group consisting of acetic acid, formic acid, propanoic acid, and mixtures thereof. . Exemplary cations for this water-soluble salt are selected from the group consisting of potassium, sodium, lithium, and mixtures thereof. In more preferred embodiments, the cation is sodium or potassium. Exemplary anions of this water-soluble salt are selected from the group consisting of phosphate, dihydrogen phosphate, monohydrogen phosphate, oxalate, silicate, mixtures thereof, and hydrates thereof. be done. In more preferred embodiments, the anion is selected from the group consisting of phosphate, dihydrogen phosphate, monohydrogen phosphate, mixtures thereof, and hydrates thereof. In most preferred embodiments, the anion is selected from the group consisting of dihydrogen phosphate, monohydrogen phosphate, mixtures thereof, and hydrates thereof. The addition of water-soluble salts may be done dropwise or in one step. If dropwise, this addition preferably takes place within 10 minutes. More preferably, the salt addition is done in one step.

According to one embodiment of the present invention, the at least one H ₃ O ⁺ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, citric acid, oxalic acid, acetic acid, formic acid, and mixtures thereof. be done. Preferably, at least one _H3O ⁺ ion donor is at least partially neutralized with a corresponding cation such as hydrochloric acid, sulfuric acid, sulfite, phosphoric acid, oxalic acid; Li ⁺ , Na ⁺ or K ⁺ . _{HPO 4 2- at} least partially neutralized with corresponding cations such as Li ⁺ , Na ⁺ , K ⁺ , Mg ²⁺ , or Ca ²⁺ ; ^and mixtures ^thereof . selected, more preferably at least one acid is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid, and mixtures thereof, most preferably at least one H ₃ O ⁺ ion donor is a phosphate.

Addition of one or more H ₃ O ⁺ ion donors to the suspension can be done as a concentrated solution or as a more dilute solution. Preferably, the molar ratio of H ₃ O ⁺ ion donor to natural or precipitated calcium carbonate is from 0.01 to 4, more preferably from 0.02 to 2, even more preferably from 0.05 to 1, most It is preferably 0.1 to 0.58.

Alternatively, the H ₃ O ⁺ ion donor can be added to the water prior to suspending the natural or precipitated calcium carbonate.

In the next step the natural ground or precipitated calcium carbonate is treated with carbon dioxide. Carbon dioxide is automatically formed when strong acids such as sulfuric acid or hydrochloric acid are used to treat natural ground or precipitated calcium carbonate with H ₃ O ⁺ ion donors. Alternatively or additionally, carbon dioxide may be supplied from an external source.

The treatment with H ₃ O ⁺ ion donor and the treatment with carbon dioxide can be carried out simultaneously, which is the case when strong or moderately strong acids are used. It is also possible to first treat with the H ₃ O ⁺ ion donor first with a medium strength acid, for example with a pKa of 0-2.5 at 20° C., in which case carbon dioxide is Being formed in situ, the carbon dioxide treatment will automatically occur simultaneously with the H ₃ O ⁺ ion donor treatment, followed by further treatment with carbon dioxide supplied from an external source.

In a preferred embodiment, the H ₃ O ⁺ ion donor treatment step and/or carbon dioxide treatment step is repeated at least once, more preferably multiple times. According to one embodiment, the at least one H ₃ O ⁺ ion donor is added over a period of at least about 5 minutes, typically from about 5 to about 30 minutes. Alternatively, the at least one H ₃ O ⁺ ion donor is added for about 30 minutes, preferably about 45 minutes, sometimes about 1 hour or more.

After H ₃ O ⁺ ion donor treatment and carbon dioxide treatment, the pH of the aqueous suspension measured at 20° C. is above 6.0, preferably above 6.5, more preferably above 7.0. , even more preferably naturally reaching a value above 7.5, thereby exceeding 6.0, preferably above 6.5, more preferably above 7.0, even more preferably above 7.5 Surface-reacted natural or precipitated calcium carbonate is prepared as an aqueous suspension having a pH greater than .

It is understood that the H ₃ O ⁺ ion donor treatment and the carbon dioxide treatment can be performed over a wide temperature range. Preferably, the H ₃ O ⁺ ion donor treatment and the carbon dioxide treatment can be performed at room temperature or at an elevated temperature. For example, if the H ₃ O ⁺ ion donor treatment and the treatment with carbon dioxide are carried out at elevated temperature, the treatment is preferably carried out at 30-90°C, more preferably 40-80°C, most preferably 50-80°C. , for example, in the range of 60 to 80°C.

Further details on the preparation of surface-reacted natural calcium carbonate can be found in WO 00/39222 A1, WO 2004/083316 A1, WO 2005/121257 A2, WO 2009/074492 A1, EP 2 264 108 A1, EP 2 264 109 A1, and US 2004/0020410 A1, the contents of which references are incorporated into the present application. .

Surface-reacted precipitated calcium carbonate is similarly obtained. As can be understood in detail from WO 2009/074492 A1, the surface-reacted precipitated calcium carbonate dissolves precipitated calcium carbonate with H ₃ O ⁺ ions and in an aqueous medium and is water-insoluble. obtained by contacting in an aqueous medium with an anion capable of forming a calcium salt to form a slurry of surface-reacted precipitated calcium carbonate, wherein the surface-reacted precipitated calcium carbonate comprises at least It includes an insoluble and at least partially crystalline calcium salt of the anion formed on a portion of the surface.

The solubilized calcium ions correspond to an excess of solubilized calcium ions over the solubilized calcium ions naturally produced upon dissolution of precipitated calcium carbonate by H ₃ O ⁺ ions, wherein: The H ₃ O ⁺ ions are provided only in the form of counterions to the anions, i.e., through the addition of the anions in the form of acids or non-calcium acid salts, and entirely free of additional calcium ions or sources of calcium ions. Provided in the presence.

This excess of solubilized calcium ions is preferably removed by the addition of a soluble neutral or acidic calcium salt or in situ with an acid or neutral or acidic non-calcium salt that produces a soluble neutral or acidic calcium salt. Served with the addition of salt.

The H ₃ O ⁺ ions are provided by the addition of an acid or acid salt of the anion or by the addition of an acid or acid salt that acts simultaneously to provide some or all of the excess solubilized calcium ions. may be

In a further preferred embodiment of the preparation of surface-reacted natural ground calcium carbonate or surface-reacted precipitated calcium carbonate, the natural ground or precipitated calcium carbonate is combined with an alkaline earth metal such as silicate, silica, aluminum hydroxide, sodium or potassium aluminate. are reacted with acid and/or carbon dioxide in the presence of at least one compound selected from the group consisting of aluminates, magnesium oxide, and mixtures thereof. Preferably, the at least one silicate is selected from aluminum silicate, calcium silicate or alkaline earth metal silicate. These ingredients can be added to an aqueous suspension containing natural ground or precipitated calcium carbonate prior to the addition of acid and/or carbon dioxide.

Alternatively, the silicate and/or silica and/or aluminum hydroxide and/or alkaline earth metal aluminate and/or magnesium oxide components are combined with natural or precipitated calcium carbonate and acid and It can be added to an aqueous suspension of natural or precipitated calcium carbonate in a state where the reaction with carbon dioxide has already started. Further details regarding the preparation of surface-reacted natural or precipitated calcium carbonate in the presence of at least one silicate and/or silica and/or aluminum hydroxide and/or alkaline earth metal aluminate component can be found in International Publication No. 2004/083316 A1, the contents of which reference is incorporated into the present application.

The surface-reacted calcium carbonate can be kept in suspension and can be further stabilized by a dispersing agent if desired. Conventional dispersants known to those skilled in the art may be used. Preferred dispersants include polyacrylic acid and/or carboxymethylcellulose.

Alternatively, the aqueous suspensions mentioned above can be dried, whereby the solid (i.e., dry or containing so little water as not to be in fluid form) surface reaction Natural ground calcium carbonate or surface-reacted precipitated calcium carbonate is obtained in the form of granules or powder.

The surface-reacted calcium carbonate can have various particle shapes such as, for example, rose, golf ball, and/or brain shapes.

According to one embodiment, the specific surface area of the surface-reacted calcium carbonate, measured using nitrogen and the BET method, is between 15 m ² /g and 200 m ² /g, preferably between 20 m ² /g and 180 m ² /g, and more Preferably from 25 m ² /g to 160 m ² /g, most preferably from 30 m ² /g to 90 m ² /g. The BET specific surface area in the sense of the invention is defined as the surface area of the particles divided by the mass of the particles. As used herein, specific surface area is measured by adsorption using the BET isotherm (ISO 9277:2010) and is given in units of m ² /g.

The present inventors have surprisingly found that surface-reacted calcium carbonate having a specific surface area of 30 m ² /g to 90 m ² /g can be used as the second component of the cosmetic and/or skin care dry composition of the present invention. It has been found that a cosmetic and/or skin care dry composition having particularly good sensory properties such as adhesion to the skin, softness and spreadability (spreadability) can be obtained.

According to one embodiment, the surface-reacted calcium carbonate has a volume median particle size d ₅₀ of 0.1-75 μm, preferably 0.5-50 μm, more preferably 1-40 μm, even more preferably 1.2-30 μm. , still more preferably 1.5 to 15 μm, most preferably 3 to 10 μm.

Furthermore, the surface-reacted calcium carbonate particles have a volume top-cut particle size d ₉₈ of 2 to 150 μm, preferably 4 to 100 μm, more preferably 6 to 80 μm, still more preferably 8 to 60 μm, still more preferably 8 to 30 μm, It is most preferably 12-25 μm.

The _value of dx represents the diameter for which _x % of the particles have a diameter less than dx. This means that the value of d98 means that ₉₈ % of all particles have a size smaller than that size. The value of _d98 is also referred to as "top cut". _Values for dx may be given in volume percent or weight percent. Thus, the d50 (weight) value is the weight median particle size, i.e., ₅₀ % by weight of all particulates are smaller than this particle size, and the _d50 (volume) value is the volume median particle size. ie, 50% by volume of all particulates are smaller than this particle size.

Volume median particle size _d50 was evaluated using a Malvern Mastersizer 2000 laser diffraction system or a Malvern Mastersizer 3000 laser diffraction system. The d50 or _d98 values measured using a Malvern Mastersizer 2000 laser diffraction system or a Malvern Mastersizer 3000 laser diffraction system are the diameters such that 50% or ₉₈ % by volume of the particles, respectively, have a diameter below this value. indicate a value. The raw data obtained from the measurements are analyzed using Mie theory with a particle refractive index of 1.57 and an absorption index of 0.005. Measurements were carried out in an aqueous solution of 0.1% by weight Na ₄ P ₂ O ₇ .

The weight median particle size is determined by the sedimentation method, which is an analysis of sedimentation behavior in a gravitational field. Measurements are made using a Sedigraph™ 5100 or 5120 from Micromeritics Instrument Corporation. This method and apparatus are known to those skilled in the art and are commonly used for particle size determination of fillers and pigments. Measurements are made in an aqueous solution of 0.1 wt. % Na ₄ P ₂ O ₇ . Sample dispersion was performed using high speed stirring and sonication.

This process and equipment are known to those skilled in the art and are commonly used to determine the particle size of fillers and pigments.

Specific pore volume was measured by mercury intrusion porosimetry using a Micromeritics Autopore V9620 mercury porosimeter with a maximum applied mercury pressure of 414 MPa (60,000 psi) and a Laplace throat diameter equivalent to 0.004 μm (˜nm). be. The equilibration time used for each pressure step is 20 seconds. The sample material is sealed in a 5 cm ³ chamber powder penetrometer for analysis. Data are corrected for mercury compression, penetrometer expansion, and sample material compression using the software Pore-Comp (Gane, P.A.C., Kettle, J.P., Matthews, Ｇ．Ｐ． ａｎｄ Ｒｉｄｇｗａｙ， Ｃ．Ｊ．， “Ｖｏｉｄ Ｓｐａｃｅ Ｓｔｒｕｃｔｕｒｅ ｏｆ Ｃｏｍｐｒｅｓｓｉｂｌｅ Ｐｏｌｙｍｅｒ Ｓｐｈｅｒｅｓ ａｎｄ Ｃｏｎｓｏｌｉｄａｔｅｄ Ｃａｌｃｉｕｍ Ｃａｒｂｏｎａｔｅ Ｐａｐｅｒ－Ｃｏａｔｉｎｇ Ｆｏｒｍｕｌａｔｉｏｎｓ”， Ｉｎｄｕｓｔｒｉａｌ ａｎｄ Ｅｎｇｉｎｅｅｒｉｎｇ Ｃｈｅｍｉｓｔｒｙ Ｒｅｓｅａｒｃｈ， ３５（５）， １９９６， ｐｐ．１７５３－１７６４）。

The total pore volume seen in the cumulative indentation data can be divided into two regions with indentation data ranging from 214 μm to about 1-4 μm, where coarse packing (packing) of the sample between any aggregate structures is indicates a strong contribution. Below these diameters, there is fine interparticle packing of the particles themselves. If they also have intragranular pores, this region will exhibit bimodality, with mercury penetrating into pores narrower than the mode switching point, i.e., finer than the inflection point of the bimodal. The pore volume defines the specific intraparticle pore volume. The sum of these three regions gives the overall pore volume of the powder, which is largely dominated by powder sedimentation at the coarse pore ends of the compaction/distribution of the original sample.

Taking the first derivative of the integrated indentation curve reveals the pore size distribution based on equivalent Laplace diameters, which necessarily includes pore shielding. The differential curve clearly shows the coarse aggregate pore structure region, the inter-particle pore region and, if present, the intra-particle pore region. Once the intraparticle pore size range is known, subtract the remaining interparticle pore volume and interaggregate pore volume from the total pore volume to obtain the pore volume per unit mass (as the specific pore volume), the internal pore size. It is possible to obtain the desired pore volume of the pores only. Of course, the same principle of subtraction applies when isolating any other pore size region of interest.

Preferably, the intraparticle intrusion specific pore volume of the surface-reacted calcium carbonate is 0.1 to 2.3 cm ³ /g, more preferably 0.2 to 2.0 cm ³ /g, calculated from mercury porosimetry measurement. , particularly preferably 0.4 to 1.8 cm ³ /g, most preferably 0.6 to 1.6 cm ³ /g.

The intra-particle pore size of the surface-reacted calcium carbonate is preferably in the range of 0.004 to 1.6 μm, more preferably 0.005 to 1.3 μm, particularly preferably 0.006, as specified by mercury porosimetry. ~1.15 μm, most preferably in the range 0.007-1.0 μm, eg 0.004-0.16 μm.

According to a preferred embodiment, the volume median particle size d ₅₀ of the surface-reacted calcium carbonate is between 1.5 and 15 μm, preferably between 4 and 8 μm; 140 m ² /g, preferably 30 to 90 m ² /g; and the intraparticle intrusion specific pore volume, calculated from mercury porosimetry measurement, is 0.2 to 2.0 cm ³ /g, preferably 0.2 cm 3 /g. 6 to 1.6 cm ³ /g.

According to another exemplary embodiment, the surface-reacted calcium carbonate has a volume median particle size d ₅₀ of 5-9 μm; a specific surface area of 45-85 m ² /g, measured using nitrogen and the BET method. and the volume topcut particle size d ₉₈ is between 13 and 20 μm.

Because of its intra- and inter-pore structure, surface-reacted calcium carbonate is more likely to release previously adsorbed and/or absorbed substances over time compared to common materials with similar specific surface areas. It can be an excellent agent. Thus, generally any agent that fits into the intra- and/or inter-particle pores of surface-reacted calcium carbonate is suitable for transport by the surface-reacted calcium carbonate according to the present invention. For example, active agents such as those selected from the group comprising pharmaceutically active agents, bioactive agents, disinfectants, preservatives, flavorants, surfactants, oils, fragrances, essential oils, and mixtures thereof can be used. can. According to one embodiment, at least one active agent is associated with the surface-reacted calcium carbonate.

According to one embodiment of the present invention, the surface-reacted calcium carbonate comprises a water-insoluble and at least partially crystalline calcium salt of at least one anion of an acid, which is either naturally ground calcium carbonate or precipitated calcium carbonate. is formed on the surface of According to one embodiment, the water-insoluble and at least partially crystalline calcium salt of the anion of at least one acid coats the surface of the natural ground or precipitated calcium carbonate at least partially, preferably completely. covering. Depending on the at least one acid used, the anions may be sulphate, sulphite, phosphate, citrate, oxalate, acetate, formate and/or chloride ions.

According to one embodiment, the surface-reacted calcium carbonate is:
(i) a specific surface area of 15-200 m ² /g, measured using nitrogen and BET methods according to ISO 9277:2010, and (ii) 0.1-2.3 cm ³ , calculated from mercury porosimetry measurements. /g intraparticle intrusion specific pore volume,
have

According to one preferred embodiment, the specific surface area of the second component, which is surface-reacted calcium carbonate, measured using nitrogen and the BET method, is between 20 m ² /g and 180 m ² /g, preferably between 25 m ² /g and 160 m ² /g, most preferably between 30 m ² /g and 90 m ² /g; volume median particle size d ₅₀ between 1.2 and 30 μm, preferably between 1.5 and 15 μm, most preferably between 3 and 10 μm. and the volume topcut particle size d ₉₈ is between 8 and 60 μm, even more preferably between 8 and 30 μm, most preferably between 12 and 25 μm.

Cosmetic and/or Skin Care Dry Compositions The present invention is a cosmetic and/or skin care composition comprising a mixture of a first component that is natural ground or precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate. It relates to dry compositions. The surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H ₃ O ⁺ ion donor. It is formed in situ by treatment with an ion donor and/or supplied from an external source.

According to one embodiment, the dry cosmetic and/or skin care composition is a dry cosmetic composition. For example, the cosmetic dry composition can be an eyeshadow, makeup powder, lip powder, face powder, body powder, or cosmetic powder, including blushers. According to another embodiment, the dry cosmetic and/or skin care composition is a dry skin care composition. For example, dry skin care compositions can be skin care powders, including shaving powders, body powders, baby powders, foot powders, and deodorant powders. According to yet another embodiment, the dry cosmetic and/or skin care composition is a dry cosmetic and skin care composition.

The dry cosmetic and/or skin care composition may be present in any form that allows its use as a dry cosmetic and/or skin care composition. The dry cosmetic and/or skin care composition may be a powder, for example a loose powder or a compact powder. A "compact powder" in the sense of the present invention is a cosmetic and/or skin care dry composition, to which a binder, preferably a metal stearate, is added to the composition and/or preferably by mechanical means. means a dry cosmetic and/or skin care composition produced by compressing the dry composition to form a cake having sufficient hardness to maintain its shape and prevent fragmentation do. A "loose powder" in the sense of the present invention is a dry cosmetic and/or skin care composition which does not contain a binder for the production of a compact powder and/or has not been compacted to form a compact powder. means

According to one embodiment, the dry cosmetic and/or skin care composition is a powder. According to one embodiment, the dry cosmetic and/or skin care composition is a loose or compact powder, preferably a loose powder. In one preferred embodiment, the dry cosmetic and/or skin care composition is a baby powder or body powder. A "baby powder" is a powder typically used to absorb moisture and/or bodily fluids after a diaper change and/or to prevent diaper rash or unpleasant odors. A "body powder" is used to absorb moisture and/or bodily fluids, e.g., underarm or foot sweat, to provide a dry and pleasant body feel, to avoid unpleasant odors, and/or to e.g. It is a powder used to avoid skin friction with Generally, baby powder can be used for body powder purposes and vice versa.

The dry cosmetic and/or skin care composition may comprise the first component and the second component in specific weights relative to each other. According to one embodiment, the first component comprises 1% to 99%, preferably 30% to 99%, more preferably 50% by weight, based on the total weight of the first and second components. % to 95% by weight, even more preferably 60% to 95% by weight, most preferably 70% to 90% by weight, and the second component comprises the sum of the first component and the second component. Based on weight, 1 wt% to 99 wt%, preferably 1 wt% to 70 wt%, more preferably 5 wt% to 50 wt%, even more preferably 5 wt% to 40 wt%, most preferably 10 wt% It is present in an amount from wt % to 30 wt %.

According to another preferred embodiment, the first component is present in an amount of 85% to 95% by weight, based on the total weight of the first component and the second component, and the second component comprises and the second component in an amount of 5% to 15% by weight.

The dry cosmetic and/or skin care composition can also contain the first component and the second component in a specific weight relative to the total weight of the dry cosmetic and/or skin care composition. According to one embodiment, the first component comprises 1% to 99% by weight, preferably 30% to 99% by weight, more preferably It is present in an amount of 50% to 95%, even more preferably 60% to 95%, most preferably 70% to 90% by weight. According to another embodiment, the second component comprises from 1% to 99% by weight, preferably from 1% to 70% by weight, more preferably from 1% to 70% by weight, based on the total weight of the dry cosmetic and/or skin care composition. It is present in an amount of 5 wt% to 50 wt%, even more preferably 5 wt% to 40 wt%, most preferably 10 wt% to 30 wt%. According to yet another embodiment, the first component comprises from 1% to 99% by weight, preferably from 30% to 99% by weight, more preferably from 30% to 99% by weight, based on the total weight of the dry cosmetic and/or skin care composition. is present in an amount of 50% to 95%, even more preferably 60% to 95%, most preferably 70% to 90% by weight, and the second component is cosmetic and/or skin care 1 wt% to 99 wt%, preferably 1 wt% to 70 wt%, more preferably 5 wt% to 50 wt%, even more preferably 5 wt% to 40 wt%, based on the total weight of the dry composition , most preferably in an amount of 10% to 30% by weight.

For example, based on the total weight of the dry cosmetic and/or skin care composition, the first component is present in an amount of 50% to 90%, preferably 55% to 85% by weight, and the second The ingredients are present in an amount of 5% to 35%, preferably 5% to 30% by weight. In another preferred embodiment, the first component is present in an amount of 60-90% by weight, preferably 65-85% by weight, based on the total weight of the dry cosmetic and/or skin care composition, and the second The two components are present in amounts of 5% to 35% by weight, preferably 5% to 30% by weight.

Furthermore, the dry cosmetic and/or skin care composition can comprise a mixture of the first component and the second component in a certain weight relative to the total weight of the composition. According to one embodiment, the dry cosmetic and/or skin care composition comprises a mixture of the first component and the second component, based on the total weight of the dry cosmetic and/or skin care composition, from 1 to 99% by weight, preferably 10-99% by weight, more preferably 30-98% by weight, even more preferably 50-95% by weight, most preferably 60-90% by weight.

As noted above, certain more specific ingredients may be preferred as the first and second ingredients of dry cosmetic and/or skin care compositions.

According to a preferred embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component which is natural ground calcium carbonate and a second component which is surface-reacted calcium carbonate, wherein the surface-reacted Calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, the carbon dioxide being at least one H ₃ O ⁺ ion donor. and/or supplied from an external source. According to another preferred embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component which is natural ground calcium carbonate and a second component which is surface-reacted calcium carbonate, wherein Surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide contains at least one H ₃ O ⁺ ion. formed in situ by treatment with a donor and/or supplied from an external source, wherein the at least one H ₃ O ⁺ ion donor is phosphoric acid.

According to a preferred embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component which is natural ground calcium carbonate and a second component which is surface-reacted calcium carbonate, wherein the first component has a volume median particle size d ₅₀ of 0.5 to 10 μm, preferably 0.8 to 8 μm, and a specific surface area of 1 m ² /g to 20 m ² /g, measured using nitrogen and the BET method. , preferably from 2 m ² /g to 15 m ² /g, and wherein the surface-reacted calcium carbonate comprises natural ground or precipitated calcium carbonate, carbon dioxide and at least one H ₃ O ⁺ ion donor. wherein the carbon dioxide is formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source, wherein the at least one H ₃ The O ⁺ ion donor is phosphoric acid, and wherein the volume median particle size d ₅₀ of the second component is 1.5-15 μm, preferably 3-10 μm, and the specific surface area is nitrogen and BET 25 m ² /g to 160 m ² /g, preferably 30 m ² /g to 90 m ² /g, measured using a method.

According to another preferred embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component which is natural ground calcium carbonate and a second component which is surface-reacted calcium carbonate, wherein the second The volume median particle size d ₅₀ of one component is 0.5 to 10 μm, preferably 0.8 to 8 μm, and the specific surface area is 1 m ² /g to 20 m ² , measured using nitrogen and the BET method. /g, preferably from 2 m ² /g to 15 m ² /g, and wherein the surface-reacted calcium carbonate comprises natural ground or precipitated calcium carbonate, carbon dioxide and at least one H ₃ O ⁺ ion donor. The carbon dioxide is a reaction product with the body, the carbon dioxide being formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source, wherein the at least one The H ₃ O ⁺ ion donor is phosphoric acid, and wherein the volume median particle size d ₅₀ of the second component is 1.5-15 μm, preferably 3-10 μm, and the specific surface area is nitrogen and BET method, from 25 m ² /g to 160 m ² /g, preferably from 30 m ² /g to 90 m ² /g, wherein the first component is the first component and the second component and the second component is present in an amount of 50% to 95% by weight, preferably 60% to 95% by weight, based on the total weight of the % to 50% by weight, preferably 5% to 40% by weight, and the mixture of the first component and the second component is based on the total weight of the dry cosmetic and/or skin care composition. are present in an amount of 60-95% by weight, preferably 70-90% by weight.

According to yet another preferred embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component that is natural ground calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein The volume median particle size d ₅₀ of the first component is 0.5-10 μm, preferably 0.8-8 μm, and the specific surface area is 1 m ² /g-20 m, measured using nitrogen and the BET method. ² /g, preferably from 2 m ² /g to 15 m ² /g, and wherein the surface-reacted calcium carbonate comprises natural ground or precipitated calcium carbonate, carbon dioxide and at least one H ₃ O ⁺ ion A reaction product with a donor, the carbon dioxide being formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source, wherein the at least one one H ₃ O ⁺ ion donor is phosphoric acid, and wherein the volume median particle size d ₅₀ of the second component is 1.5-15 μm, preferably 3-10 μm, and the specific surface area is 25 m ² /g to 160 m ² /g, preferably 30 m ² /g to 90 m ² /g, measured using nitrogen and the BET method, and wherein the first component comprises the first component and the second is present in an amount of 50% to 95% by weight, preferably 60% to 95% by weight, based on the total weight of the components, and the second component is based on the total weight of the first component and the second component , is present in an amount of 5% to 50% by weight, preferably 5% to 40% by weight.

According to another embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component that is precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein the surface-reacted Calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, the carbon dioxide being at least one H ₃ O ⁺ ion donor. and/or supplied from an external source.

According to a further embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component that is precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein the first component The volume median particle size d ₅₀ is between 0.3 and 10 μm, preferably between 0.4 and 7 μm, and the specific surface area, measured using nitrogen and the BET method, is between 3 m ² /g and 35 m ² /g, Preferably from 4 m ² /g to 25 m ² /g, and wherein the surface-reacted calcium carbonate is a mixture of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor. The reaction product, the carbon dioxide, is formed in situ by treatment with at least one _H3O ⁺ ion donor and/or supplied from an external source, wherein the at least one _H3O The ⁺ ion donor is phosphoric acid, and wherein the volume median particle size d ₅₀ of the second component is 1.5-15 μm, preferably 3-10 μm, and the specific surface area is nitrogen and BET method from 25 m ² /g to 160 m ² /g, preferably from 30 m ² /g to 90 m ² /g.

According to a further embodiment, the dry cosmetic and/or skin care composition comprises a mixture of a first component that is precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate, wherein the first component The volume median particle size d ₅₀ is 0.3 to 10 μm, preferably 0.4 to 7 μm, and the specific surface area, measured using nitrogen and the BET method, is 3 m ² /g to 35 m ² /g, Preferably from 4 m ² /g to 25 m ² /g, and wherein the surface-reacted calcium carbonate is a mixture of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor. The reaction product, the carbon dioxide, is formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source, wherein the at least one H ₃ O The ⁺ ion donor is phosphoric acid, and wherein the volume median particle size d ₅₀ of the second component is 1.5-15 μm, preferably 3-10 μm, and the specific surface area is nitrogen and BET method 25 m ² /g to 160 m ² /g, preferably 30 m ² /g to 90 m ² /g, where the first component is the total weight of the first component and the second component and the second component is present in an amount of from 50% to 95% by weight, preferably from 70% to 90% by weight, based on the total weight of the first component and the second component, from 5% to present in an amount of 50% by weight, preferably 5% to 40% by weight, and wherein the mixture of the first component and the second component is based on the total weight of the cosmetic and/or skin care dry composition are present in an amount of 60-95% by weight, preferably 70-90% by weight.

The dry cosmetic and/or skin care composition of the present invention preferably does not contain certain materials or ingredients. According to one embodiment, the dry cosmetic and/or skin care composition does not comprise talc or talc-containing materials. "Talc or talc-containing materials" are known to those skilled in the art. “Talc” is a clay mineral containing hydrated magnesium silicate and can be represented by the chemical formula Mg ₃ Si ₄ O ₁₀ (OH) ₂ . Talc has a value of 1 on the Mohs hardness scale. By "talc-containing material" is meant any material containing talc as an ingredient. A "talc-containing material" is, for example, an ultrabasic rock such as soapstone.

Talc is a common raw material for dry cosmetic and/or skin care compositions and is used to provide dry cosmetic and/or skin care compositions with specific properties such as moisture absorption properties and soft touch. used for The inventors have surprisingly found that the dry cosmetic and/or skin care compositions of the present invention show similar or even better results compared to known talc-containing dry cosmetic and/or skin care compositions. It was found that the

According to another embodiment, the dry cosmetic and/or skin care composition is free of silicate- and/or aluminate-containing materials. "Silicate- and/or aluminate-containing material" is known to the person skilled in the art and can mean, for example, mica, kaolin or silica.

The dry cosmetic and/or skin care composition can consist of a mixture of the first component and the second component, as described above. In most cases, however, the dry cosmetic and/or skin care composition according to the invention may comprise further ingredients in addition to the mixture of the first and second components mentioned above. The person skilled in the art knows materials that are possible and/or suitable for use in dry cosmetic and/or skin care compositions, and depending on the form of the composition and its use, such material will be selected.

According to one embodiment, the cosmetic and/or skin care dry composition comprises one or more further ingredients, preferably the one or more further ingredients are fragrances, fragrances, antibacterial and/or antiseptic agents. , fatty acids or salts thereof, fatty alcohols, vegetable or synthetic oils, carbohydrate polymers, mineral additives, pigments, salts, and mixtures thereof. It is noted that each of the optional further ingredients may be present as a mixture of such ingredients, i.e. as a mixture of two or more of such ingredients, unless otherwise specified. be understood. For example, a fragrance means one fragrance, but also includes mixtures of two or more fragrances.

According to one embodiment, the dry cosmetic and/or skin care composition comprises one or more further ingredients in an amount of 0.1 to 40% by weight, based on the total weight of the dry cosmetic and/or skin care composition. %, preferably 0.1-35% by weight, more preferably 10-35% by weight.

The dry cosmetic and/or skin care composition may further comprise an antimicrobial agent and/or an antiseptic. According to one embodiment, the dry cosmetic and/or skin care composition may further comprise an antimicrobial and/or antiseptic agent, further comprising an antimicrobial and/or antiseptic agent. For example, suitable antimicrobials and/or antiseptics include paraoxybenzoic acid alkyl esters, benzoic acid, sodium benzoate, sorbic acid, potassium sorbate, phenoxyethanol, salicylic acid, carbolic acid, sorbic acid, hexachlorophene, benzalkonium chloride, Chlorhexidine chloride, trichlorocarbanilide, or phenoxyethanol.

For example, carbohydrate polymers such as starch, in particular rice or corn starch, can be added to cosmetic and/or skin care dry compositions for the purpose of further improving application properties such as lipid absorption, spreadability or texture. can. According to one embodiment, the dry cosmetic and/or skin care composition comprises a carbohydrate polymer, preferably a natural or modified starch, more preferably a natural starch, even more preferably corn starch, rice starch or tapioca. It further comprises a native starch selected from the group consisting of starches, or mixtures thereof. According to one preferred embodiment, the carbohydrate polymer, preferably starch, is present in the dry cosmetic and/or skin care composition in an amount of 1 to 20, based on the total weight of the dry cosmetic and/or skin care composition. It is present in an amount of weight percent, preferably 5-20 weight percent, more preferably 5-15 weight percent.

Fatty acids or salts thereof can also be added to the dry cosmetic and/or skin care compositions according to the invention. By adding a fatty acid or a salt thereof, the skin adhesion of dry cosmetic and/or skin care compositions and/or the compressibility of powders can be further improved. Salts derived from organic carboxylic acids having 8 to 22 carbon atoms, preferably 12 to 18 carbon atoms, such as metal stearate, laurate, or myristate, are added to the compositions of the present invention. can be added to For example, suitable fatty acid salts may be selected from the group consisting of zinc, magnesium, or lithium stearate, zinc laurate, and magnesium myristate. Thus, according to one embodiment, the dry cosmetic and/or skin care composition comprises at least one fatty acid or a salt thereof, preferably a salt of a fatty acid, more preferably a metal stearate, even more preferably Further comprising a metal stearate selected from the group consisting of zinc stearate, magnesium stearate, lithium stearate, and mixtures thereof. According to a preferred embodiment, the dry cosmetic and/or skin care composition contains at least one fatty acid or salt thereof, preferably a salt of a fatty acid, more preferably a metal stearate, for cosmetic and/or skin care. It is further included in an amount of 0.1-4 wt%, preferably 0.5-3 wt%, more preferably 1.0-2.5 wt%, based on the total weight of the dry composition.

Dry cosmetic and/or skin care compositions may be used to further improve the skin adherence of the composition and/or to further enhance the mildness of application and/or the cosmetic and/or skin care compositions described herein. Or, it may further contain a vegetable or synthetic oil to act as a vehicle for additional ingredients of the dry skin care composition. According to another embodiment, the dry cosmetic and/or skin care composition further comprises a vegetable or synthetic oil. Preferably, the dry cosmetic and/or skin care composition comprises a vegetable oil. Vegetable or synthetic oils suitable for use in dry cosmetic and/or skin care compositions are known to those skilled in the art. Suitable vegetable or synthetic oils are eg sesame oil, macadamia oil, jojoba oil, aloe vera oil or olive oil. According to a preferred embodiment, the dry cosmetic and/or skin care composition comprises 0.1 to 5% by weight, based on the total weight of the dry cosmetic and/or skin care composition, of vegetable oil, preferably olive oil, It is further included in an amount of preferably 0.5-4% by weight, more preferably 1-3% by weight.

Furthermore, the dry cosmetic and/or skin care composition of the present invention can further comprise fatty alcohols, preferably linear fatty alcohols having 8 to 22 carbon atoms. Suitable fatty alcohols can be, for example, cetyl alcohol, myristyl alcohol, stearyl alcohol, behenyl alcohol, or mixtures thereof. According to one embodiment, the dry cosmetic and/or skin care composition comprises fatty alcohols, preferably linear fatty alcohols having 8 to 22 carbon atoms. According to a preferred embodiment, the dry cosmetic and/or skin care composition comprises a fatty alcohol, preferably a linear fatty alcohol having 8 to 22 carbon atoms, in the dry cosmetic and/or skin care composition. 0.1 to 4 wt%, preferably 0.2 to 2 wt%, more preferably 0.5 to 1.5 wt%, based on the total weight of the

Additionally, the dry cosmetic and/or skin care composition may further comprise one or more pigments to further modify skin appearance, if desired. Therefore, according to one embodiment, the dry cosmetic and/or skin care composition further comprises a pigment. For example, suitable pigments can be zinc oxide, titanium oxide, yellow iron oxide, red iron oxide, black iron oxide, vanadium oxide, zirconium oxide, or manganese oxide. According to one embodiment, the dry cosmetic and/or skin care composition further comprises a pigment.

Additionally or alternatively, the dry cosmetic and/or skin care composition of the present invention further improves, for example, the absorbency, skin appearance and/or sun protection of the dry cosmetic and/or skin care composition. Mineral additives and/or salts may be further included in order to According to one embodiment, the dry cosmetic and/or skin care composition further comprises a mineral additive, preferably kaolin. According to another embodiment, the dry cosmetic and/or skin care composition further comprises a salt, preferably zinc oxide. According to yet another embodiment, the dry cosmetic and/or skin care composition further comprises a mineral additive, preferably kaolin, and a salt, preferably zinc oxide. According to a preferred embodiment, the dry cosmetic and/or skin care composition contains a mineral additive, preferably kaolin, in an amount of 0.1 to 7.0, based on the total weight of the dry cosmetic and/or skin care composition. It is further included in an amount of 5 wt%, preferably 2-7.5 wt%, more preferably 4-6 wt%. According to another preferred embodiment, the dry cosmetic and/or skin care composition contains 0.1 to 5 salts, preferably zinc oxide, based on the total weight of the dry cosmetic and/or skin care composition. It is further included in an amount of weight %, preferably 1-4 weight %, more preferably 2-3 weight %.

Furthermore, the dry cosmetic and/or skin care composition according to the present invention may be used to further improve the odor of the composition before, during and/or after application to the skin and/or A fragrance and/or perfume may be further included to give the skin a more pleasant odor during and/or after application to the skin. Therefore, according to one embodiment, the dry cosmetic and/or skin care composition further comprises a fragrance and/or perfume. The fragrance and/or perfume can be adsorbed and/or absorbed on the surface of the first component and/or on the surface of the second component present in the dry cosmetic and/or skin care composition. According to one embodiment, the fragrance and/or perfume is adsorbed and/or absorbed on the surface of the first component and/or on the surface of the second component.

A "fragrance" in the sense of the present invention means an organic compound, natural or synthetic, that is sufficiently volatile to be perceived by humans via the olfactory system. The fragrance can be selected from natural and/or synthetic fragrances known to be suitable for cosmetic formulations, for example mint oil. In one embodiment, the dry cosmetic and/or skin care composition comprises a fragrance, preferably 0.01 to 5.0% by weight, based on the total weight of the dry cosmetic and/or skin care composition. is further included in an amount of 0.5-3.0 wt%, more preferably 1.0-2.0 wt%.

"Fragrance" in the sense of the invention means one or more organic compounds, natural or synthetic, which give the composition a particular odor and flavor. Perfumes can be selected from ketones, esters, aldehydes, terpenes, aromatics, alkylpyrazines, or mixtures thereof. A natural flavoring agent is, for example, vanillin. A synthetic fragrance is, for example, ethyl vanillin. Flavorings may also mean flavoring extracts obtained from fruits, seeds or herbs. For example, the flavoring may be vanilla or strawberry extract. In one embodiment, the dry cosmetic and/or skin care composition comprises 0.01 to 5.0% by weight, based on the total weight of the dry cosmetic and/or skin care composition, preferably It is further included in an amount of 0.5-3.0 wt%, more preferably 1.0-2.0 wt%.

According to one embodiment, the dry cosmetic and/or skin care composition comprises from 1 to 20% by weight, based on the total weight of the dry cosmetic and/or skin care composition, of a carbohydrate polymer, preferably starch, preferably in an amount of 5-15% by weight; fatty acids or salts thereof, preferably metal stearates, in an amount of 0.1-4% by weight, more preferably 1.0-2.5% by weight; vegetable oils, preferably olive oil in an amount of 0.1-5% by weight, preferably 1-3% by weight; fatty alcohol, preferably a linear fatty alcohol having 8-22 carbon atoms, 0.1-4 % by weight, preferably 0.5-1.5%; a mineral additive, preferably kaolin, in an amount of 0.1-7.5%, preferably 4-6% by weight; and a salt. , preferably zinc oxide, in an amount of 0.1-5% by weight, preferably 2-3% by weight.

According to one embodiment, the dry cosmetic and/or skin care composition contains 50 to 90 wt. %, preferably 60-90% by weight; a second component as defined herein, in an amount of 5-50%, preferably 5-40% by weight; a carbohydrate polymer, preferably starch, in an amount of 1-90% by weight; in an amount of 20% by weight, preferably 5-15% by weight; a fatty acid or a salt thereof, preferably a metal stearate, in an amount of 0.1-4% by weight, more preferably 1.0-2.5% by weight. a vegetable oil, preferably olive oil, in an amount of 0.1 to 5% by weight, preferably 1 to 3% by weight; a fatty alcohol, preferably a linear fatty alcohol having 8 to 22 carbon atoms, 0 a mineral additive, preferably kaolin, in an amount of 0.1-7.5%, preferably 4-6% by weight; and a salt, preferably zinc oxide, in an amount of 0.1-5% by weight, preferably 2-3% by weight.

According to one embodiment, the dry cosmetic and/or skin care composition comprises a mixture of the first component and the second component, based on the total weight of the dry cosmetic and/or skin care composition. a carbohydrate polymer, preferably starch, in an amount of 1-20%, preferably 5-15% by weight; a fatty acid or a salt thereof, preferably a metal stearate. salt in an amount of 0.1-4% by weight, more preferably 1.0-2.5% by weight; vegetable oil, preferably olive oil, in an amount of 0.1-5% by weight, preferably 1-3% by weight; fatty alcohols, preferably linear fatty alcohols having 8 to 22 carbon atoms, in amounts of 0.1 to 4% by weight, preferably 0.5 to 1.5% by weight; mineral additives , preferably kaolin, in an amount of 0.1-7.5% by weight, preferably 4-6% by weight; and a salt, preferably zinc oxide, in an amount of 0.1-5% by weight, preferably 2-3% by weight. %; fragrance in an amount of 0.01 to 5.0% by weight, preferably 0.5 to 3.0% by weight; and wherein the cosmetic and/or skin care dry composition is the first component in an amount of 60-95% by weight, preferably 70-90% by weight, and the second component in an amount of 5-40% by weight, based on the total weight of the first and second components , preferably in an amount of 10 to 30% by weight.

Method The present invention further relates to a method for making the dry cosmetic and/or skin care compositions described herein. This method includes the following steps:
(a) providing a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b);

The first component of step (a) can be provided in dry form or in the form of an aqueous suspension. According to one embodiment, the first component of step (a) is provided in dry form. Preferably, the water content of the first component provided in step (a) is less than 3.0 wt%, preferably less than 2.0 wt%, more preferably less than 2.0 wt%, based on the total dry weight of the first component Less than 1.0% by weight. The residual moisture content can be measured as described above for dry cosmetic and/or skin care compositions.

According to another embodiment, the first component of step (a) may be provided in the form of an aqueous suspension, preferably in the form of a slurry. Preferably, the first component provided in step (a) is present in the slurry in an amount of 1 wt% to 90 wt%, more preferably 3 wt% to 60 wt%, even more preferably 5 wt%, based on the weight of the slurry. It is present in weight percent to 40 weight percent, most preferably 10 weight percent to 25 weight percent.

Similarly, the second component provided in step (b) can also be provided in dry form or in the form of an aqueous suspension. According to one embodiment, the second component of step (b) is provided in dry form. Preferably, the water content of the second component is less than 10 wt%, preferably less than 5.0 wt%, more preferably less than 3.0 wt%, based on the total dry weight of the second component. The residual moisture content can be measured as described above for dry cosmetic and/or skin care compositions.

In an alternative embodiment, the second component of step (b) is provided in the form of an aqueous suspension, preferably in the form of a slurry. Preferably, the second component provided in step (b) comprises, in the slurry, 1 wt% to 90 wt%, more preferably 3 wt% to 60 wt%, even more preferably 5 wt%, based on the weight of the slurry. It is present in weight percent to 40 weight percent, most preferably 10 weight percent to 25 weight percent.

The first component of step (a) and the second component of step (b) can be provided in dry form. Thus, according to one embodiment, the first component of step (a) and the second component of step (b) are provided in dry form.

However, it is also possible for the first component of step (a) and/or the second component of step (b) to be provided in the form of an aqueous suspension. Thus, according to one embodiment, the first component of step (a) is provided in dry form and the second component of step (b) is provided in the form of an aqueous suspension, preferably in the form of a slurry. be done. According to another embodiment, the first component of step (a) is provided in the form of an aqueous suspension, preferably in the form of a slurry, and the second component of step (b) is provided in dry form. . According to yet another embodiment, the first component of step (a) and the second component of step (b) are provided in the form of an aqueous suspension, preferably in the form of a slurry. According to one embodiment, an aqueous dispersion, preferably a slurry, is obtained in mixing step (c) and the solids content is from 1 to 90, based on the total weight of the aqueous dispersion obtained in mixing step (c). % by weight, preferably 3-60% by weight, more preferably 10-45% by weight, most preferably 10-40% by weight.

If the first component of step (a) and the second component of step (b) are provided in dry form, the mixing step (c) may be a dry blending step. According to one embodiment, the mixing step (c) is a dry blending step. Preferably, the dry blending step is performed in a plowshare mixer, ribbon mixer, or cone single shaft mixer, more preferably in a cone single shaft mixer. Those skilled in the art are familiar with such types of mixers.

The addition of the first component of step (a) and the second component of step (b) to the mixing vessel in mixing step (c) may occur simultaneously or in any order. According to one embodiment, the first component of step (a) is added to the second component of step (b) to the mixing vessel in mixing step (c), or vice versa. According to another embodiment, the first component of step (a) and the second component of step (b) are added simultaneously to the mixing vessel in mixing step (c).

If the mixing step (c) is a dry blending step, the dry cosmetic and/or skin care composition according to the invention can be obtained directly in the mixing step (c). In one embodiment, the dry cosmetic and/or skin care composition according to the invention is obtained directly in the mixing step (c).

Accordingly, in one embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b) to obtain a cosmetic and/or skin care dry composition;

In one preferred embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component in dry form which is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component in dry form which is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b) to obtain a cosmetic and/or skin care dry composition, wherein the mixing step (c) comprises a dry It is a blending process.

If the first component of step (a) and/or the second component of step (b) are provided in the form of an aqueous suspension, mixing step (c) may be a wet mixing step. According to one embodiment, the mixing step (c) is a wet mixing step. A "wet-mixing process" in the sense of the present invention means the mixing of an aqueous suspension or slurry. The wet mixing step can be performed under conventional mixing conditions. Those skilled in the art will adapt these mixing conditions (such as mixing pallet configuration and mixing speed) according to their process equipment. It is understood that any wet-mixing method suitable for cosmetic and/or skin care compositions may be used.

When the mixing step (c) is a wet mixing step, the process further comprises a drying step (d) to obtain the cosmetic and/or skin care dry composition according to the invention. The drying step (d) may be performed by any drying process suitable for drying cosmetic and/or skin care compositions. Preferably, the drying step (d) is a spray drying step. According to one embodiment, the method further comprises a drying step (d), preferably a spray drying or superheated steam drying step, more preferably a spray drying step. Preferably, the spray drying process is carried out at 80-250° C., more preferably 100-200° C., until the dry weight of the dry cosmetic and/or skin care composition is constant. Drying particulate matter by superheated steam drying is known to those skilled in the art. For example, the superheated steam drying step can be performed as described in WO2012/140028.

According to one embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component in the form of an aqueous suspension, preferably a slurry, which is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component in the form of an aqueous suspension, preferably a slurry, or in dry form, which is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b);
(d) drying the mixture obtained in step (c), preferably by spray drying, to obtain a cosmetic and/or skin care dry composition;

According to one embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component in the form of an aqueous suspension, preferably a slurry, or in dry form, which is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component in the form of an aqueous suspension, preferably a slurry, which is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b);
(d) drying the mixture obtained in step (c), preferably by spray drying, to obtain a cosmetic and/or skin care dry composition;

According to one embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component in the form of an aqueous suspension, preferably a slurry, which is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component in the form of an aqueous suspension, preferably a slurry, which is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b);
(d) drying the mixture obtained in step (c), preferably by spray drying, to obtain a cosmetic and/or skin care dry composition;

In one preferred embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component that is natural ground calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with a ₃ O ⁺ ion donor and/or supplied from an external source, the at least one H ₃ O ⁺ ion donor being phosphoric acid;
(c) mixing the first component of step (a) with the second component of step (b);

In one preferred embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component that is natural ground calcium carbonate;
Here, the volume median particle size d ₅₀ of the first component is 0.5-10 μm, preferably 0.8-8 μm, and the specific surface area is 1 m ² /, measured using nitrogen and the BET method. g to 20 m ² /g, preferably 2 m ² /g to 15 m ² /g,
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with a ₃ O ⁺ ion donor and/or supplied from an external source, the at least one H ₃ O ⁺ ion donor being phosphoric acid;
(c) mixing the first component of step (a) with the second component of step (b);

In one preferred embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component that is natural ground calcium carbonate in dry form;
Here, the volume median particle size d ₅₀ of the first component is 0.5-10 μm, preferably 0.8-8 μm, and the specific surface area is 1 m ² /, measured using nitrogen and the BET method. g to 20 m ² /g, preferably 2 m ² /g to 15 m ² /g,
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with a ₃ O ⁺ ion donor and/or supplied from an external source, the at least one H ₃ O ⁺ ion donor being phosphoric acid; and a median volume of the second component The particle size d ₅₀ is between 1.5 and 15 μm, preferably between 3 and 10 μm, and the specific surface area, measured using nitrogen and the BET method, is between 25 m ² /g and 160 m ² /g, preferably 30 m ² . /g to 90 m ² /g,
(c) mixing the first component of step (a) with the second component of step (b);

In one preferred embodiment, a method for manufacturing a cosmetic and/or skin care dry composition comprises the following steps:
(a) providing a first component in dry form which is natural ground calcium carbonate;
Here, the volume median particle diameter d ₅₀ of the first component is 0.5 to 10 μm, preferably 0.8 to 8 μm, and the specific surface area is 1 m ² / when measured using nitrogen and the BET method. g to 20 m ² /g, preferably 2 m ² /g to 15 m ² /g,
(b) providing a second component that is surface-reacted calcium carbonate in dry form;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with a ₃ O ⁺ ion donor and/or supplied from an external source, the at least one H ₃ O ⁺ ion donor being phosphoric acid; and a median volume of the second component The particle size d ₅₀ is between 1.5 and 15 μm, preferably between 3 and 10 μm, and the specific surface area, measured using nitrogen and the BET method, is between 25 m ² /g and 160 m ² /g, preferably 30 m ² . /g to 90 m ² /g,
(c) mixing the first component of step (a) with the second component of step (b) to obtain a cosmetic and/or skin care dry composition;

The method of the invention can comprise further steps depending on the form of the dry cosmetic and/or skin care composition. For example, if the dry cosmetic and/or skin care composition is a compact powder, the method may comprise step (e) of compacting the powder into a compact powder. Preferably, such compression molding step is performed by applying mechanical force to the composition. In one embodiment, the method further comprises step (e) of compression molding the dry cosmetic and/or skin care composition.

Additionally, the method may further comprise step (f) of packaging the dry cosmetic and/or skin care composition. The dry cosmetic and/or skin care composition may be packaged in any container suitable for storing the dry cosmetic and/or skin care composition, such as a powder bottle, powder canister, metal pan or godet, or cosmetic case. .

In one embodiment, a method for manufacturing a dry cosmetic and/or skin care composition comprises the steps of:
(a) providing a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b); and (f) packaging the dry cosmetic and/or skin care composition.

In one embodiment, a method for manufacturing a dry cosmetic and/or skin care composition comprises the steps of:
(a) providing a first component in dry form, which is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate in dry form;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b) to obtain a cosmetic and/or skin care dry composition; and (f) the composition obtained in step (c). Packaging dry cosmetic and/or skin care compositions.

The method involves applying a dry cosmetic and/or skin care composition to the skin to achieve one or more of the desired effects described herein, such as modifying skin feel, modifying skin appearance, or absorbing bodily fluids. It can further comprise step (g) of achieving. Thus, according to one embodiment, the method further comprises step (g) of applying the dry cosmetic and/or skin care composition to human skin.

In one embodiment, a method for manufacturing a dry cosmetic and/or skin care composition comprises the steps of:
(a) providing a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
wherein step (b) comprises the following steps:
Step (b1) reacting natural ground or precipitated calcium carbonate with carbon dioxide and at least one _H3O ⁺ ion donor, wherein the carbon dioxide is at least one _H3O ⁺ ion donor formed in situ by treatment with the body and/or supplied from an external source, and optionally
step (b2) drying the reaction product obtained in step (b1);
(c) mixing the first component of step (a) with the second component of step (b); and (g) applying the dry cosmetic and/or skin care composition to human skin.

In one embodiment, a method for manufacturing a dry cosmetic and/or skin care composition comprises the steps of:
(a) providing a first component in dry form, which is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate in dry form;
Here, the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide comprises at least one H formed in situ by treatment with ₃ O ⁺ ion donor and/or supplied from an external source,
(c) mixing the first component of step (a) with the second component of step (b) to obtain a cosmetic and/or skin care dry composition; and (g) cosmetic and/or skin care. Applying the dry composition to human skin.

Use The present invention also relates to a dry composition comprising a mixture of a first component which is natural ground or precipitated calcium carbonate and a second component which is surface-reacted calcium carbonate as a cosmetic and/or skin care composition. Also for use, wherein the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein the carbon dioxide is , formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source.

The use of the dry composition described herein as a cosmetic and/or skin care dry composition includes the use of the dry composition in a cosmetic and/or skin care dry composition or a cosmetic and/or skin care dry composition. It is intended to encompass the use of dry compositions as components of compositions. Thus, according to one embodiment, the use of the dry compositions described herein is in cosmetic and/or skin care compositions. According to one embodiment, the use of the dry compositions described herein is as a component of cosmetic and/or skin care compositions.

The use of dry cosmetic and/or skin care compositions is not restricted to specific areas of the skin. For example, dry cosmetic and/or skin care compositions can be used for facial skin, hand and/or arm skin, foot and/or leg skin, genital skin, buttock skin, It can be used for abdominal and/or chest skin, shoulder and/or back skin, armpit skin, and the like. According to one embodiment, the dry cosmetic and/or skin care composition is applied to the skin, preferably the skin of the face, the skin of the hands and/or arms, the skin of the feet and/or legs, the skin near the genitalia, skin of the buttocks, skin of the abdomen and/or chest, skin of the shoulders and/or back, and/or skin of the armpits, preferably the skin of the face, the skin of the feet, the skin near the genitalia, the skin of the buttocks, and/or underarm skin.

The dry cosmetic and/or skin care compositions of the present invention are used to absorb fluids, reduce skin friction, modify skin feel and/or modify skin appearance. be able to. According to one embodiment, the dry cosmetic and/or skin care composition of the present invention is used to absorb fluids, to reduce skin friction, to modify skin feel and/or to soften the skin. Used to modify appearance. According to one preferred embodiment, the dry cosmetic and/or skin care composition of the present invention is used to absorb fluids, to reduce skin friction, to modify skin feel and/or Used to modify skin appearance.

For example, dry cosmetic and/or skin care compositions absorb fluids, preferably moisture and/or bodily fluids such as perspiration, sebum, lipids, or urine, to provide a drier and/or more pleasant skin feel. It can be used to bring to the user, to avoid the generation of unpleasant odors, and/or to soothe the skin. Therefore, according to one embodiment, the dry cosmetic and/or skin care composition is used to absorb moisture and/or body fluids, preferably the body fluids are sweat, sebum, lipids or urine. . According to one embodiment, the dry cosmetic and/or skin care composition is used to absorb moisture.

The dry cosmetic and/or skin care composition is further to reduce friction between the skin and objects in contact with the skin, preferably with polymeric materials such as clothing, diapers, and/or latex or nitrile gloves. can be used for Thus, according to one embodiment, the dry cosmetic and/or skin care composition is suitable for use on the skin and on objects that come in contact with the skin, preferably clothes, diapers and/or polymeric materials, preferably latex or nitrile rubber. used to reduce the friction of

Additionally, dry cosmetic and/or skin care compositions can be used to modify skin feel, for example, by providing the user with a soft, dry, and/or smooth skin feel. According to one embodiment, the dry cosmetic and/or skin care composition preferably softens and/or smoothes the skin, dries the skin and/or Used to soothe the skin. As mentioned above, the expression "skin feel" in the sense of the present invention means the feel of the skin during and/or after application of the dry cosmetic and/or skin care composition to the skin surface.

Additionally, dry cosmetic and/or skin care compositions can be used to modify skin appearance. The expression "skin appearance" in the sense of the invention relates to the optical impression of the skin to the eye of the observer during and/or after application of the dry cosmetic and/or skin care composition. The desired modification of skin appearance usually depends on the type of application of the dry cosmetic and/or skin care composition, for example mattifying the skin, coloring the skin, bleaching or lightening the skin. can mean For certain uses of dry cosmetic and/or skin care compositions, such as use as baby powder and/or body powder, skin bleaching and/or skin lightening benefits may be desired. This is because it is often perceived by users as giving the skin a particularly clean and/or cared-for appearance.

According to one embodiment, the dry cosmetic and/or skin care composition is used to modify the appearance of the skin, preferably to control shine of the skin, to color the skin, to bleach or lighten the skin. used to convert In one preferred embodiment, the dry cosmetic and/or skin care composition is used for bleaching or lightening the skin.

According to a preferred embodiment, the dry cosmetic and/or skin care composition is used as cosmetic and/or skin care powder, preferably as baby powder and/or body powder.

The present invention further provides talc or talc in dry cosmetic and/or skin care compositions of mixtures comprising a first component that is natural ground or precipitated calcium carbonate and a second component that is surface-reacted calcium carbonate. Also for use as a replacement for containing materials, wherein the surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor. where the carbon dioxide is formed in situ by treatment with at least one H ₃ O ⁺ ion donor and/or supplied from an external source. Preferably, the mixture of the first component and the second component is used as a replacement for talc or talc-containing materials in baby powders and/or body powders.

The inventors have surprisingly found that the mixture of the first and second components described herein can be used as a component of dry cosmetic and/or skin care compositions such as baby powders and/or body powders. , was found to mimic the properties of talc to some extent. In particular, the use of mixtures of the first component and the second component described herein in dry cosmetic and/or skin care compositions can improve skin feel, skin appearance, moisture and body fluids during and/or after application. In terms of absorption, it may exhibit similar or even improved properties compared to dry cosmetic and/or skin care compositions containing comparable or the same amount of talc to provide these properties. Found.

FIG. 1 shows the sensory properties of Inventive Compositions 1-4 (IC-1-IC-4) and Comparative Composition 1 (CC-1) as assessed by a panel of eight evaluators. FIG. 2 shows adsorption/absorption of water by compositions 1-4 of the invention (IC-1-IC-4) and comparative composition 1 (CC-1). The weight change of each composition is plotted against relative humidity when the samples were stored at 23°C for 360 minutes. FIG. 3 shows compositions 5 to 8 (IC-5 to IC-8) of the present invention and comparative composition 2 (CC-2), as well as comparative composition CC-Y. Total fragrance release immediately after (t=0) and after 30 days (t=30d) is shown. Fragrance release was measured at 36.5° C. (body temperature) by SPME-GC-MS.

1. Measurement methods The measurement methods carried out in the examples are described below.

Particle Size Distribution Volume-based median particle size d50 (volume) and volume-based _topcut particle size _d98 (volume) were evaluated using a Malvern Mastersizer 3000 laser diffraction system (Malvern Instruments Plc., Great Britain). The values d ₅₀ (volume) or d ₉₈ (volume) indicate diameter values such that 50% by volume or 98% by volume of the particles respectively have a diameter below this value. The raw data obtained from the measurements were analyzed using Mie theory with a particle refractive index of 1.57 and an absorption index of 0.005. These methods and apparatus are known to those skilled in the art and are commonly used to determine the particle size distribution of fillers and pigments. Measurements were carried out in an aqueous solution of 0.1% by weight Na ₄ P ₂ O ₇ . Sample dispersion was performed using high speed stirring and sonication.

Specific surface area (SSA)
The specific surface area was measured by the BET method with nitrogen according to ISO 9277:2010 after conditioning the samples by heating at 250° C. for 30 minutes. Prior to such measurements, samples were filtered through a Buchner funnel, rinsed with deionized water, and dried at 110° C. in an oven for at least 12 hours.

Intraparticle intrusion specific pore volume (unit: cm ³ /g)
Specific pore volume was measured by mercury intrusion porosimetry using a Micromeritics Autopore V9620 mercury porosimeter with a maximum applied mercury pressure of 414 MPa (60,000 psi) and a Laplace throat diameter equivalent to 0.004 μm (˜nm). rice field. The equilibration time used for each pressure step was 20 seconds. The sample material was sealed in a 5 cm ³ chamber powder penetrometer for analysis. Data were corrected for mercury compression, penetrometer expansion, and sample material compression using the software Pore-Comp (Gane, P.A.C., Kettle, J.P., Matthews, G. ．Ｐ． ａｎｄ Ｒｉｄｇｗａｙ， Ｃ．Ｊ．， “Ｖｏｉｄ Ｓｐａｃｅ Ｓｔｒｕｃｔｕｒｅ ｏｆ Ｃｏｍｐｒｅｓｓｉｂｌｅ Ｐｏｌｙｍｅｒ Ｓｐｈｅｒｅｓ ａｎｄ Ｃｏｎｓｏｌｉｄａｔｅｄ Ｃａｌｃｉｕｍ Ｃａｒｂｏｎａｔｅ Ｐａｐｅｒ－Ｃｏａｔｉｎｇ Ｆｏｒｍｕｌａｔｉｏｎｓ”， Ｉｎｄｕｓｔｒｉａｌ ａｎｄ Ｅｎｇｉｎｅｅｒｉｎｇ Ｃｈｅｍｉｓｔｒｙ Ｒｅｓｅａｒｃｈ， ３５（５）， １９９６， ｐｐ．１７５３－１７６４）。

The total pore volume seen in the cumulative indentation data can be divided into two regions with indentation data ranging from 214 μm to about 1-4 μm, where coarse packing (packing) of the sample between any aggregate structures is indicates a strong contribution. Below these diameters, there is fine interparticle packing of the particles themselves. If they also have intragranular pores, this region will exhibit bimodality, with mercury penetrating into pores narrower than the mode switching point, i.e., finer than the inflection point of the bimodal. The pore volume defines the specific intraparticle pore volume. The sum of these three regions gives the overall pore volume of the powder, which is largely dominated by powder sedimentation at the coarse pore ends of the compaction/distribution of the original sample.

Taking the first derivative of the integrated indentation curve reveals the pore size distribution based on equivalent Laplace diameters, which necessarily includes pore shielding. The differential curve clearly shows the coarse aggregate pore structure region, the inter-particle pore region and, if present, the intra-particle pore region. Once the intraparticle pore size range is known, subtract the remaining interparticle pore volume and interaggregate pore volume from the total pore volume to obtain the pore volume per unit mass (as the specific pore volume), the internal pore size. It is possible to obtain the desired pore volume of the pores only. Of course, the same principle of subtraction applies when isolating any other pore size region of interest.

Sorption Kinetics Four grams of material were taken in duplicate and exposed to a specified temperature and relative humidity (RH) for 360 minutes. Temperature was kept constant at 23° C. during cycle completion and RH was maintained constant for a given cycle, i.e. 10%-30%-50%-70%-85%-70%-50%-30%- 10% complied. The weight change was recorded at the end of the cycle (360 min) and plotted on a graph to reflect the sorption kinetics of the sample at a particular RH.

A descriptive analysis (reference: Norm ISO 13299) performed by a panel of 8 evaluators was performed on the sensory analytics products. Analysis sessions were conducted on May 22, 2019 at exactly 12:00, 14:30 and 16:30 in a room dedicated to sensory analysis and equipped to the UNI ISO 8589 standard. Panel members looking at products contributed during the preliminary sessions to develop a common glossary and, together with the panel leaders, to articulate evaluation scales and terms.

Thus, the following attributes were identified and defined:
Visual attributes (appearance):
- Color (color of product as is): light - dark - Compressibility of powder (compression behavior): low - high Attributes related to first contact (upon pick-up):
- Cushioning effect (movement is attenuated (absorbed) when product is pinched between thumb and forefinger): low - high - Slipperiness (ease of moving product between thumb and forefinger): Low-High Attributes Evaluated When Applied:
- spreadability (ease of distributing the product over the skin): low to high - coverage (extent to cover skin imperfections): low to high - whitening (skin becomes white when product is rubbed in) degree of retention): low to high Attributes evaluated after application (feel after application):
- smoothness (degree of lack of marks of roughness on the skin): low to high - skin glossiness (amount of light reflected on the skin): low to high

Each attribute was evaluated using the same quantity for each sample. Products were tested in a "blind" fashion and were differentiated from control (reference) samples only by sign. Visual attributes were evaluated on the as-is product. Attributes related to initial contact were evaluated between the fingertips, and samples were tested on a defined area of the forearm for attributes related to feel during and after application of the product. Two circular marks of 5.1 cm each were made with a skin scribe on the volar area of the forearm. The circle closest to the elbow was identified as Site 1, and the circle closest to the wrist was identified as Site 2. The detection sheet contained a multi-pointed unstructured linear scale (0-10) to indicate where the sample to be analyzed should be located for each attribute. On this scale, the control position was assumed to be in the middle (value=5) for all sensory attributes, possibly because test samples had higher or lower intensities than this. This is because the. The evaluator was required to indicate on the scale the strength of the test sample compared to the control sample. The evaluator conducted three evaluation sessions.

Fragrance Release The release profiles of the dark stored samples were analyzed immediately after loading (T0) and after 30 days (T30). A 1 g sample (in triplicate) was weighed into Head-Space Vials and vigorously homogenized on a GC-MS autosampler shaker. Fragrance release was measured at 36.5° C. (body temperature) by SPME-GC-MS.

Patch test products will be tested on 20 adult male and female volunteers selected after application of inclusion/exclusion criteria for study subjects.

Subjects excluded from the study:
- children and persons under the age of consent - pregnant or lactating women - subjects with dermatitis - subjects with a history of allergic skin reactions - subjects under anti-inflammatory drug therapy (steroidal or non-steroidal) )
- Subjects who have participated in a similar study in the past 2 months

Prior to the start of the study, all subjects are informed of the purpose and nature of the study and any foreseeable risks involved in participating in the study, and give written informed consent to the study. Each candidate fills out a form registering the date, time and test product. Product application is performed by technically qualified and skilled personnel under the supervision of a medical dermatologist. A skin evaluation is performed by a dermatologist. An occlusive patch test was performed using a Curatest F patch applied to the volar area of the forearm.

Visual assessment of skin irritation is performed on two occasions: 24 hours after application of Curates F (30 minutes after patch removal) and 48 hours after application of Curates F (24 hours after patch removal).
Evaluation parameters and scoring of skin reactions are reported below:
Erythema:
0=no signs of erythema; 0.5=minimal or questionable erythema; 1=slight redness, patchy and diffuse; 2=moderate uniform redness; 3=strong uniform redness;
edema:
0 = no edema; 1 = mild edema (not visible); 2 = mild edema (clearly visible); 3 = moderate edema; 4 = severe edema (extends beyond application area).

The sum of the erythema and edema scores is defined as the "irritation index". Irritation index values 30 minutes and 24 hours after patch removal (24 hours and 48 hours after product application) are recorded on the volunteer's form.

2. component
Natural Ground Calcium Carbonate NGCC
High purity natural calcium carbonate commercially available from Omya with a d ₅₀ (volume) in the range of 1.8-2.6 μm.

Surface-reacted calcium carbonate SRCC1
Surface-reacted calcium carbonate (SRCC1) (d ₅₀ (volume) = 6.6 µm, d ₉₈ = 13.7 µm, SSA = 59.9 m ² /g). The intraparticle intrusion specific pore volume is 0.939 cm ³ /g (for a pore size range of 0.004-0.51 μm).

The SRCC was prepared by adding solids of ground limestone calcium carbonate from Omya SAS, Orgon, with a weight-based median particle size _d50 (by weight) of 1.3 μm, determined by sedimentation method, to the total weight of the aqueous suspension in a mixing vessel. 350 liters of an aqueous suspension of ground calcium carbonate was prepared and obtained by adjusting to obtain a solids content of 10% by weight based on . While mixing this slurry at a speed of 6.2 m/s, 11.2 kg of phosphoric acid in the form of an aqueous solution containing 30% by weight of phosphoric acid are added to the suspension over 20 minutes at a temperature of 70°C. did. After acid addition, the slurry was stirred for an additional 5 minutes before being removed from the vessel and dried using a jet dryer.

Surface-reacted calcium carbonate SRCC2
Surface-reacted calcium carbonate ( _SRCC2 ) (d50 (volume) = 5.1 µm, _d98 (volume) = 9.2 µm, SSA = 96.1 ^m2 /g, intraparticle intrusion specific pore volume 1.588 ^cm3 /g (for a pore size range of 0.004-0.4 μm).

In a mixing vessel, a solids content of ground limestone calcium carbonate having a particle size distribution of 90% by weight, based on the total weight of the ground calcium carbonate, is less than 2 μm, and 15% by weight, based on the total weight of the aqueous suspension, of solids. 10 liters of an aqueous suspension of ground limestone calcium carbonate was prepared by adjusting the minutes to obtain. While mixing the slurry, 2.8 kg of phosphoric acid in the form of an aqueous solution containing 30% by weight phosphoric acid was added to the suspension over a period of 10 minutes. The temperature of the suspension was maintained at 70° C. throughout the experiment. After addition of the acid, the suspension was stirred for an additional 5 minutes before being removed from the vessel and dried.

3. Preparation of Cosmetic and/or Skin Care Dry Compositions Compositions 1 to 4 of the present invention are prepared according to the method described in Section 3. below. a) or 3. b). Compositions 5-8 of the present invention were prepared in accordance with Section 3.3 below. a) or 3. b) and subsequently the method according to Section 3.3. Manufactured by the method according to c).

a) Dry Mixing of Components The calculated amounts of the first component GCC1 in dry form and the second component SRCC1 or SRCC2 in dry form were charged into an industrial spiral cone mixer and mixed. A spiral mixing blade inside the mixer induces a three-dimensional flow of the mixed powder, creating a helical upward motion in the periphery and a downward flow in the center.

b) Wet Mixing of Components The first component GCC1 was provided in dry form and resuspended in the aqueous suspension of SRCC1 or SRCC2 in the ratios indicated. The suspended aqueous mixture was then dried in a Riera Nadeu jet dryer and bagged separately.

c) Carrying Fragrances in Dry Cosmetic and/or Skin Care Compositions The dry cosmetic and/or skin care compositions are provided in powder form and placed in a Universal Tabletop Mixer Granulator (TMG 1) with a rotor speed of 1000 rpm and a chopper speed of 1000 rpm. /6, Glatt GmbH, Germany). A 6 L cone-shaped container was about 2/3 full with one of the dry cosmetic and/or skin care compositions. The dry cosmetic and/or skin care composition is then pre-mixed for 3 minutes before starting to deliver the fragrance with a peristaltic pump (Model 1B.1003-R/65, Petro Gas Ausrustungen Berlin GmbH, Germany). did. Loading was carried out at a rate of 2.5 g/min until a fragrance content of 1.5 wt% was reached. After reaching the indicated amount of fragrance, the peristaltic pump was turned off and the composition was mixed for an additional minute.

d) Examples
Composition 1 (IC-1) of the present invention : NGCC 90% by weight, SRCC1 10% by weight
Composition 2 (IC-2) of the present invention : NGCC 90% by weight, SRCC2 10% by weight
Composition 3 (IC-3) of the present invention : NGCC 70% by weight, SRCC1 30% by weight
Composition 4 (IC-4) of the present invention : NGCC 70% by weight, SRCC2 30% by weight
Composition 5 (IC-5) of the present invention : 98.5% by weight of first and second components (NGCC:SRCC1=9:1 weight ratio), 1.5% by weight of fragrance
Composition 6 (IC-6) of the present invention : 98.5% by weight of first and second components (NGCC: SRCC2 = 9:1 weight ratio), 1.5% by weight of fragrance
Composition 7 (IC-7) of the present invention : 98.5% by weight of first and second components (NGCC: SRCC1 = 7:3 weight ratio), 1.5% by weight of fragrance
Composition 8 (IC-8) of the present invention : 98.5% by weight of first and second components (NGCC:SRCC2=7:3 weight ratio), 1.5% by weight of fragrance
Comparative composition (CC-1): talc 100% by weight
Comparative composition (CC-2): talc 98.5% by weight, fragrance 1.5% by weight
Comparative composition (CC-X): SRCC2 100% by weight
Comparative composition (CC-Y): SRCC2 98.5% by weight, fragrance 1.5% by weight

4. Results a) Sensory Analysis Figure 1 shows the results of the sensory analysis of compositions 1 to 4 of the invention (IC-1 to IC-4) and comparative composition 1 (CC-1). From Figure 1 it can be seen that the composition of the present invention exhibits similar or better properties compared to Comparative Composition 1 in almost all test aspects. For example, compositions 1-4 of the present invention all show similar or better properties with respect to cushioning effect, slipperiness, and powder compressibility. Composition 1 of the present invention showed the best results.

Additionally, Table 1 shows the results of the sensory analysis of inventive compositions 1-4 compared to comparative composition CC-X (100% SRCC2).

The data show that compositions IC-1 through IC-4 of the present invention exhibit similar or better sensory properties in all aspects compared to comparative composition CC-X, which is only surface-reacted calcium carbonate. I understand. For example, inventive compositions IC-1 through IC-4 show better coverage, whitening, and spreadability than comparative composition CC-X.

b) Patch Test Using each of Compositions 1-4 of the present invention and Comparative Composition 1, a patch test was performed as described above.

b1) Patch test results of comparative composition 1 on sensitive skin:
Twenty male and female subjects between the ages of 24 and 39 were studied. None of the test subjects showed signs of erythema or edema 30 minutes after patch removal (24 hours after application) or 24 hours after patch removal (48 hours after application).

b2) Patch test results of composition 1 of the invention on sensitive skin:
Twenty male and female subjects between the ages of 24 and 39 were studied. None of the test subjects showed signs of erythema or edema 30 minutes after patch removal (24 hours after application) or 24 hours after patch removal (48 hours after application).

b3) Patch test results of composition 2 of the invention on sensitive skin:
Twenty male and female subjects between the ages of 24 and 39 were studied. None of the test subjects showed signs of erythema or edema 30 minutes after patch removal (24 hours after application) or 24 hours after patch removal (48 hours after application).

b4) Patch test results of composition 3 of the invention on sensitive skin:
Twenty male and female subjects between the ages of 24 and 39 were studied. None of the test subjects showed signs of erythema or edema 30 minutes after patch removal (24 hours after application) or 24 hours after patch removal (48 hours after application).

b5) Patch test results of composition 4 of the invention on sensitive skin:
Twenty male and female subjects between the ages of 24 and 39 were studied. None of the test subjects showed signs of erythema or edema 30 minutes after patch removal (24 hours after application) or 24 hours after patch removal (48 hours after application).

Patch tests show that compositions 1-4 of the present invention are not irritating to sensitive skin.

c) Sorption Analysis Figure 2 shows the results of the above-described sorption analysis tests carried out on inventive compositions 1 to 4 (IC-1 to IC-4) and comparative composition 1 (CC-1). Comparative Composition 1, which contains talc, absorbed the least water or moisture from the air, demonstrating the least weight change of all compositions tested. Compositions 3 and 4 of the present invention containing 30% by weight SRCC1 or SRCC2, respectively, showed the greatest composition weight change due to water absorption. Inventive compositions 1 and 2 containing 10% by weight of SRCC1 or SRCC2, respectively, absorbed less water than inventive compositions 3 and 4, but more than comparative composition 1. High water absorption can be advantageous in dry cosmetic and/or skin care compositions as it can allow better absorption of water and/or bodily fluids on the skin.

d) Fragrance Release Experiments FIG. 3 shows the test results of the fragrance release experiments described above performed on compositions 5 to 8 (IC-5 to IC-8) of the invention and comparative composition 2 (CC-2). indicate. With the data presented in Figure 3, two different aspects can be compared: (i) samples were brought to 37°C immediately after loading (t = 0) or after 30 days of storage (t = 30); and (ii) the difference in fragrance release between time t=0 and time t=30.

Regarding aspect (i), from FIG. 3 it can be seen that each of the inventive compositions 5-8 releases more fragrance from the composition than comparative composition 2 at time t=0, i.e. immediately after loading. I understand. More precisely, Comparative Composition 2 releases approximately 65% of the carried fragrance when exposed to a temperature of 37°C, while each of Compositions 5-8 of the present invention releases less of the fragrance. Release at least approximately 80%. Compositions 7 and 8 of the present invention release almost all of the loaded fragrance at time t=0. After 30 days of storage, Comparative Composition 2 released only approximately 54% of the initial loaded fragrance, compared to each of Inventive Compositions 5-8 at least 73% of the fragrance. is emitting Composition 7 of the present invention releases nearly 100% of the initial loaded fragrance after 30 days of storage. These results therefore show that compositions 5-8 of the present invention perform better than comparative composition 2 at time t=0, ie immediately after loading, and at time t=30, ie after 30 days of storage. It can be seen that it exhibits fragrance release properties.

Regarding results aspect (ii), note that for a particular composition, the difference in fragrance release measured at time t=0 and time t=30 is indicative of the composition's stability during storage. want to be For example, a composition may release 100% fragrance immediately upon application, but release only 50% fragrance after storage for 30 days. This is an indicator of fragrance and/or composition instability or degradation due to different release profiles. Comparative composition 2 released approximately 65% fragrance at time t=0 and approximately 54% fragrance at time t=30, corresponding to a difference of approximately 11%. Thus, it can be seen from Figure 3 that Comparative Composition 2 exhibits some degree of instability or degradation during storage. In contrast, compositions 5-7 of the present invention show almost identical, if not identical, release profiles at time t=0 and time t=30. Accordingly, compositions 5-7 of the present invention exhibit little or no instability or degradation during storage. From this it can be concluded that compositions 5-7 of the invention are more stable compared to comparative composition 2.

In addition, Table 2, as well as FIG. % fragrance).

The data in Table 2 and Figure 3 demonstrate that compositions IC-5 through IC-8 of the present invention have significantly higher fragrance than comparative composition CC-Y, which combines surface-reacted calcium carbonate and fragrance. It is shown to have release immediately after loading (t=0) and after 30 days of storage (t=30d). Furthermore, the data in Table 2 show that the decrease in fragrance release during storage, i.e. from t=0 to t=30d, is much higher for CC-Y than for IC-5 to IC-8. , which means that the stability of the fragrance in CC-Y is very low. For IC-5 to IC-8, there is no or only a small decrease in fragrance release over time. Therefore, the stability of IC-5 to IC-8 is much better than that of CC-Y.

Claims (15)

a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
a second component that is surface-reacted calcium carbonate;
A dry cosmetic and/or skin care composition comprising a mixture of
wherein said surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein said carbon dioxide comprises said at least one formed in situ by treatment with H ₃ O ⁺ ion donor and/or supplied from an external source;
Cosmetic and/or skin care dry composition. The dry cosmetic and/or skin care composition according to claim 1, wherein the dry cosmetic and/or skin care composition is a powder, preferably a baby powder and/or a body powder. 1% to 99% by weight, preferably 30% to 99% by weight, more preferably 50% to 95% by weight, based on the total weight of the first component and the second component %, even more preferably 60% to 95%, most preferably 70% to 90% by weight, and said second component comprises the total weight of said first component and said second component 1 wt% to 99 wt%, preferably 1 wt% to 70 wt%, more preferably 5 wt% to 50 wt%, even more preferably 5 wt% to 40 wt%, most preferably 10 wt%, based on % to 30% by weight,
3. The cosmetic and/or skin care dry composition according to claim 1 or 2. wherein said first component is a natural ground calcium carbonate selected from the group consisting of marble, chalk, limestone, and mixtures thereof; or said first component has a crystalline form of aragonite, vaterite, or calcite. A dry cosmetic and/or skin care composition according to any one of the preceding claims, which is a precipitated calcium carbonate selected from the group consisting of precipitated calcium carbonate and mixtures thereof. wherein said surface-reacted calcium carbonate is the reaction product of a natural ground calcium carbonate selected from the group consisting of marble, chalk, limestone, and mixtures thereof, with carbon dioxide and at least one _H3O ⁺ ion donor; , said carbon dioxide is formed in situ by treatment with said at least one H ₃ O ⁺ ion donor and/or is supplied from an external source; or said surface-reacted calcium carbonate is aragonite, vaterite, or precipitated calcium carbonate having the crystalline form of calcite, and mixtures thereof, with carbon dioxide and at least one H ₃ O ⁺ ion donor, said carbon dioxide is formed in situ by treatment with said at least one H ₃ O ⁺ ion donor and/or supplied from an external source;
A cosmetic and/or skin care dry composition according to any one of claims 1 to 4. said at least one _H3O ⁺ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, citric acid, oxalic acid, acid salts, acetic acid, formic acid, and mixtures thereof;
Preferably, said at least one H ₃ O ⁺ ion donor is at least partially filled with cations selected from hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid; Li ⁺ , Na ⁺ and/or K ⁺ _{HPO 4 2- at} least partially neutralized with cations selected from Li ⁺ , Na ⁺ , K ⁺ , Mg ^{2+ and} /or Ca ²⁺ ; ^and these selected from the group consisting of mixtures,
more preferably, said at least one _H3O ⁺ ion donor is selected from the group consisting of hydrochloric acid, sulfuric acid, sulfurous acid, phosphoric acid, oxalic acid and mixtures thereof;
Most preferably, said at least one _H3O ⁺ ion donor is phosphoric acid,
A cosmetic and/or skin care dry composition according to any one of claims 1 to 5. The volume median particle size d50 of said first component is _0.1-50 μm, preferably 0.5-40 μm, more preferably 0.5-20 μm, even more preferably 0.5-10 μm, most preferably 0 .8 to 8 μm, and/or the specific surface area of said first component, measured using nitrogen and the BET method, is 0.5 m ² /g to 30 m ² /g, preferably 1 m ² /g to 20 m ² /g, more preferably from 2 m ² /g to 15 m ² /g,
A cosmetic and/or skin care dry composition according to any one of claims 1 to 6. The second component has a volume median particle size d ₅₀ of 0.5 to 50 μm, preferably 1 to 40 μm, more preferably 1.2 to 30 μm, even more preferably 1.5 to 15 μm, most preferably 3 to 10 μm. and/or the specific surface area of the second component, measured using nitrogen and the BET method, is 15 m ² /g to 200 m ² /g, preferably 20 m ² /g to 180 m ² /g, more preferably is between 25 m ² /g and 160 m ² /g, most preferably between 30 m ² /g and 90 m ² /g.
Cosmetic and/or skin care dry composition according to any one of claims 1 to 7. The dry cosmetic and/or skin care composition according to any one of the preceding claims, wherein said dry cosmetic and/or skin care composition does not comprise talc or talc-containing materials. Said cosmetic and/or skin care dry composition comprises one or more further ingredients, preferably said one or more further ingredients are fragrances, fragrances, antibacterial and/or disinfectants, fatty acids or salts thereof , fatty alcohols, vegetable or synthetic oils, carbohydrate polymers, mineral additives, pigments, salts and mixtures thereof. Dry composition for skin care. A method for producing a cosmetic and/or skin care dry composition comprising the steps of:
(a) providing a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
(b) providing a second component that is surface-reacted calcium carbonate;
wherein said surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein said carbon dioxide comprises said at least one formed in situ by treatment with H ₃ O ⁺ ion donor and/or supplied from an external source;
(c) mixing said first component of step (a) with said second component of step (b); said first component of step (a) and said second component of step (b) are provided in dry form and said mixing step (c) is a dry blending step, or providing the component and/or said second component of step (b) in the form of an aqueous suspension, preferably in the form of a slurry, and said method further comprising drying the mixture obtained in step (c) (d), preferably step (d) is a spray drying process or a superheated steam drying process, more preferably a spray drying process,
12. The method of claim 11. a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
A dry composition comprising a mixture with a second component which is a surface-reacted calcium carbonate as a cosmetic and/or skin care composition, preferably as a cosmetic and/or skin care powder, most preferably as a baby powder and / or use as a body powder,
wherein said surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein said carbon dioxide comprises said at least one formed in situ by treatment with H ₃ O ⁺ ion donor and/or supplied from an external source;
use. 14. Use according to claim 13, wherein the dry composition is used to absorb fluids, reduce skin friction, modify skin feel and/or modify skin appearance. . a first component that is natural ground calcium carbonate or precipitated calcium carbonate;
and a second component that is surface-reacted calcium carbonate as a replacement for talc or talc-containing materials in cosmetic and/or skin care dry compositions,
wherein said surface-reacted calcium carbonate is the reaction product of natural ground or precipitated calcium carbonate with carbon dioxide and at least one H ₃ O ⁺ ion donor, wherein said carbon dioxide comprises said at least one formed in situ by treatment with H ₃ O ⁺ ion donor and/or supplied from an external source;
use.

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